paragraph_text: Black Lake is located in Cheboygan and Presque Isle counties in northern Michigan, United States. With a surface area of , it is the seventh largest inland lake in Michigan. The largest body of water in the Black River watershed, it drains through the Lower Black and Cheboygan rivers into Lake Huron. Black Lake is a summer destination for many families from the suburban Detroit area and from other nearby states as well as residents of the neighboring town of Onaway.

paragraph_text: Towdystan is an unincorporated settlement and First Nations community of the Dakelh people located northwest of Charlotte Lake in the western Chilcotin District of the Central Interior of British Columbia, Canada. Located southeast of Anahim Lake, the headquarters of the Ulkatcho First Nation government, it includes Towdystan Lake Indian Reserve No. 3, which is one of the Indian Reserves of the Ulkatcho Nation and is located at . The reserve had a population of 10, down 50% from a 2001 figure of 20.

paragraph_text: Nodlandsvatnet is a lake in the municipality of Eigersund in Rogaland county, Norway. It is located about east of the town of Egersund. The lake is a major reservoir for the local energy company Dalane Energi, and has a capacity of , the second largest in the area after the lake Spjodevatnet with .

paragraph_text: Green Lake is a lake in Hunter Mountains in the Southland Region of New Zealand located to the north of Lake Monowai. The lake has no surface outlets but probably feeds several streams draining to lake Monowai via springs. The lake is a basin in the debris of the Green Lake Landslide, which is the largest known above-sea-level landslide on earth. Steep escarpments on the north and east sides of the lake form the head scarp of the landslide, which has an estimated volume of .

paragraph_text: The Pitch Lake is the largest natural deposit of asphalt in the world, estimated to contain 10 million tons. It is located in La Brea in southwest Trinidad, within the Siparia Regional Corporation. The lake covers about 100 acres and is reported to be 250 feet deep.

paragraph_text: A large number of international institutions have their seats in Switzerland, in part because of its policy of neutrality. Geneva is the birthplace of the Red Cross and Red Crescent Movement and the Geneva Conventions and, since 2006, hosts the United Nations Human Rights Council. Even though Switzerland is one of the most recent countries to have joined the United Nations, the Palace of Nations in Geneva is the second biggest centre for the United Nations after New York, and Switzerland was a founding member and home to the League of Nations.

paragraph_text: Ulungur Lake is located in Fuhai County, Xinjiang, China. With an area of 1,035 square kilometers, the lake is one of China's ten largest freshwater lakes. Its main tributary is the Ulungur River. It is an endorheic lake, though the Irtysh River flows towards the Arctic Ocean less than 4 km away to the northeast.

paragraph_text: The lake is located near Hot Springs, Arkansas. Lake Ouachita is the largest lake completely in Arkansas, as the larger Bull Shoals Lake extends into Missouri. Lake Ouachita has over 690 miles (1,110 km) of shoreline and over 66,324 acres (26,840 ha) of water. It is completely surrounded by the Ouachita National Forest. Lake Ouachita is located near two other lakes, Lake Hamilton and Lake Catherine. These three lakes, DeGray Lake to the near south, and the thermal springs of Hot Springs National Park make Hot Springs a popular tourist getaway.

paragraph_text: The Cambodian government planned to have many dams on the Tonle Sap and the Mekong tributary. Tonle Sap Lake is the largest fresh water body in Cambodia and serves as a buffer in the Mekong River system for flood mitigation and is the source of beneficial dry season flows. The Tonle Sap River drains the Tonle Sap Lake from the northwest before it continues further southeastward to its lower delta in Vietnam.

paragraph_text: The Great Lakes islands consist of about 35,000 islands (scattered throughout Great Lakes), created by uneven glacial activity in the Great Lakes Basin in Canada (Ontario) and the United States. The largest of these is Manitoulin Island in Lake Huron in the province of Ontario. At 1,068 square miles (2,766 km2), it is the largest lake island in the world.

paragraph_text: Summersville Lake is a reservoir located in the US state of West Virginia. The lake is formed by a rock - fill dam (Summersville Dam) on the Gauley River, south of Summersville in Nicholas County. It is the largest lake in West Virginia, with 2,700 acres (1,100 ha) of water and over 60 miles (97 km) of shoreline at the summer pool water level. Its maximum depth is 327 feet.

paragraph_text: There were several border conflicts between Colombia and Peru in the early part of the 20th century, and in 1922, their governments signed the Salomón-Lozano Treaty in an attempt to resolve them. As part of this treaty, the border town of Leticia and its surrounding area was ceded from Peru to Colombia, giving Colombia access to the Amazon River. On 1 September 1932, business leaders from Peruvian rubber and sugar industries who had lost land, as a result, organised an armed takeover of Leticia. At first, the Peruvian government did not recognise the military takeover, but President of Peru Luis Sánchez Cerro decided to resist a Colombian re-occupation. The Peruvian Army occupied Leticia, leading to an armed conflict between the two nations. After months of diplomatic negotiations, the governments accepted mediation by the League of Nations, and their representatives presented their cases before the Council. A provisional peace agreement, signed by both parties in May 1933, provided for the League to assume control of the disputed territory while bilateral negotiations proceeded. In May 1934, a final peace agreement was signed, resulting in the return of Leticia to Colombia, a formal apology from Peru for the 1932 invasion, demilitarisation of the area around Leticia, free navigation on the Amazon and Putumayo Rivers, and a pledge of non-aggression.

paragraph_text: Lake Superior is the largest of the Great Lakes of North America. The lake is shared by the Canadian province of Ontario to the north, the US state of Minnesota to the west, and Wisconsin and the Upper Peninsula of Michigan to the south. It is generally considered the largest freshwater lake in the world by surface area. It is the world's third - largest freshwater lake by volume and the largest by volume in North America. The furthest north and west of the Great Lakes chain, Superior has the highest elevation and drains into the St. Mary's River.

paragraph_text: Switzerland lies between latitudes 45° and 48° N, and longitudes 5° and 11° E. It contains three basic topographical areas: the Swiss Alps to the south, the Swiss Plateau or Central Plateau, and the Jura mountains on the west. The Alps are a high mountain range running across the central-south of the country, comprising about 60% of the country's total area. The majority of the Swiss population live in the Swiss Plateau. Among the high valleys of the Swiss Alps many glaciers are found, totalling an area of 1,063 square kilometres (410 sq mi). From these originate the headwaters of several major rivers, such as the Rhine, Inn, Ticino and Rhône, which flow in the four cardinal directions into the whole of Europe. The hydrographic network includes several of the largest bodies of freshwater in Central and Western Europe, among which are included Lake Geneva (also called le Lac Léman in French), Lake Constance (known as Bodensee in German) and Lake Maggiore. Switzerland has more than 1500 lakes, and contains 6% of Europe's stock of fresh water. Lakes and glaciers cover about 6% of the national territory. The largest lake is Lake Geneva, in western Switzerland shared with France. The Rhône is both the main source and outflow of Lake Geneva. Lake Constance is the second largest Swiss lake and, like the Lake Geneva, an intermediate step by the Rhine at the border to Austria and Germany. While the Rhône flows into the Mediterranean Sea at the French Camarque region and the Rhine flows into the North Sea at Rotterdam in the Netherlands, about 1000 km apart, both springs are only about 22 km apart from each other in the Swiss Alps.

paragraph_text: The Akosombo Dam, also known as the Volta Dam, is a hydroelectric dam on the Volta River in southeastern Ghana in the Akosombo gorge and part of the Volta River Authority. The construction of the dam flooded part of the Volta River Basin, and led to the subsequent creation of Lake Volta. The flooding that created the Lake Volta reservoir displaced many people and had a significant impact on the local environment. Lake Volta is the largest man-made lake in the world by surface area. It covers , which is 3.6% of Ghana's land area. With a volume of 148 cubic kilometers, Lake Volta is the world's third largest man-made lake by volume, the largest being Lake Kariba which is located between Zimbabwe and Zambia in Southern Africa and contains 185 cubic kilometers of water.

paragraph_text: Stansbury Island is the second largest island within the Great Salt Lake in the U.S. state of Utah. Located in Tooele County, it is considered an island even though a dirt causeway connects it to the mainland. Stansbury Island was named after Howard Stansbury, the leader of a government expedition that surveyed the lake in 1849.

paragraph_text: Bäckaskog Castle () in Kristianstad Municipality, Scania, southern Sweden, was originally a monastery built in the 13th century. It was transformed into a castle in the 16th century. The castle is located on the isthmus between Ivö Lake (Scania's largest lake) and Oppmanna Lake.

paragraph_text: The Großer Plöner See ("Great Plön Lake") or Lake Plön ("Plöner See", ) is the largest lake (30 km²) in Schleswig-Holstein, Germany. It is located near the town of Plön. Its main tributary, as well as its main outflow, is the River Schwentine.

paragraph_text: The Lake Maitland mine is a large mine located in the western part of Australia in Western Australia. Lake Maitland represents one of the largest uranium reserves in Australia having estimated reserves of 28.7 million tonnes of ore grading 0.0029% uranium.

paragraph_text: Taal Lake, formerly known as Bombón Lake, is a freshwater lake in the province of Batangas, on the island of Luzon in the Philippines. The lake fills Taal Caldera, a large volcanic caldera formed by very large eruptions between 500,000 and 100,000 years ago. It is the country's third-largest lake, after Laguna de Bay and Lake Lanao. Volcano Island, the location of Taal Volcano's historical eruptions and responsible for the lake's sulfuric content, lies near the center of the lake. There is a crater lake on Volcano Island. Known as the Yellow Lake or the Main Crater Lake, it contains its own small island, Vulcan Point. Vulcan Point was thought to be the largest third-order island in the world, but Treasure Island (Ontario) is much bigger and is thought to be the world largest, and is also on a freshwater lake.

Question: What is the largest lake in the country that headquartered the organization that intervened in border conflicts between Colombia and Peru with mediation for the governments?
Answer: Lake Geneva