Given the question: Information: - The Overseas Highway is a highway carrying U.S. Route 1 (US1) through the Florida Keys. Large parts of it were built on the former right-of-way of the Overseas Railroad, the Key West Extension of the Florida East Coast Railway. Completed in 1912, the Overseas Railroad was heavily damaged and partially destroyed in the Labor Day Hurricane of 1935. The Florida East Coast Railway was financially unable to rebuild the destroyed sections, so the roadbed and remaining bridges were sold to the state of Florida for $640,000. - Little Duck Key is a small island in the lower Florida Keys. - The Seven Mile Bridge is a famous bridge in the Florida Keys, in Monroe County, Florida, United States. It connects Knight's Key (part of the city of Marathon, Florida) in the Middle Keys to Little Duck Key in the Lower Keys. Among the longest bridges in existence when it was built, it is part of the Overseas Highway in the Keys, which is part of the 2,369-mile U.S. Route 1. - The Straits of Florida, Florida Straits, or Florida Strait is a strait located south-southeast of the North American mainland, generally accepted to be between the Gulf of Mexico and the Atlantic Ocean, and between the Florida Keys (U.S.) and Cuba. It is 150km (93mi) wide at the narrowest point between Key West and the Cuban shore, and has been sounded to a depth of 6,000 feet. The strait carries the Florida Current, the beginning of the Gulf Stream, from the Gulf of Mexico. - The Florida East Coast Railway is a Class II railroad operating in the U.S. state of Florida and since 2007 has been a subsidiary of Railroad Acquisition Holdings, LLC, itself a subsidiary of Fortress Investment Group, LLC. - The Miami metropolitan area is the metropolitan area including Miami and nearby communities. The U.S. Office of Management and Budget designates the area as the Miami-Fort Lauderdale-West Palm Beach, FL Metropolitan Statistical Area, used for statistical purposes by the United States Census Bureau and other entities. The metropolitan statistical area comprises Miami-Dade, Broward, and Palm Beach countiesFlorida's three most populous, together forming South Floridawith principal cities including Miami, Fort Lauderdale, Pompano Beach, West Palm Beach, and Boca Raton. - Pigeon Key is a small island containing the historic district of Pigeon Key, Florida. The island is home to 8 buildings on the National Register of Historic Places, some of which remain from its earliest incarnation as a work camp for the Florida East Coast Railway. Today these buildings serve a variety of purposes, ranging from housing for educational groups to administrative offices for the non-profit Pigeon Key Foundation. The former Assistant Bridge Tender's House has been converted into a small museum featuring artifacts and images from Pigeon Key's colorful past. It is located off the old Seven Mile Bridge, at approximately mile marker 45, west of Knight's Key, (city of Marathon in the middle Florida Keys) and just east of Moser Channel, which is the deepest section of the span. - Marathon is a city on Knight's Key, Boot Key, Key Vaca, Fat Deer Key, Long Point Key, Crawl Key and Grassy Key islands in the middle of the Florida Keys, in Monroe County, Florida, United States. As of the 2000 census, the city had a total population of 10,255. As of 2014, the population estimated by the U.S. Census Bureau was 8,708. - A "metropolitan area", sometimes referred to as a "metro area" or just "metro", is a region consisting of a densely populated urban core and its less-populated surrounding territories, sharing industry, infrastructure, and housing. A metro area usually comprises multiple jurisdictions and municipalities: neighborhoods, townships, boroughs, cities, towns, exurbs, suburbs, counties, districts, states, and even nations like the eurodistricts. As social, economic and political institutions have changed, metropolitan areas have become key economic and political regions. Metropolitan areas include one or more urban areas, as well as satellite cities, towns and intervening rural areas that are socio-economically tied to the urban core, typically measured by commuting patterns. - U.S. Route 1 (US1) is a major northsouth U.S. Highway that serves the East Coast of the United States. It runs , from Fort Kent, Maine, at the CanadaUS border, south to Key West, Florida, making it the longest north-south road in the United States. US1 is generally paralleled by Interstate 95 (I-95), though the former is significantly farther west (inland) between Jacksonville, Florida, and Petersburg, Virginia. The highway connects most of the major cities of the east coast, including Miami, Richmond, Washington, D.C., Baltimore, Philadelphia, New York City, and Boston, passing from the Southeastern United States to New England. - The Pigeon Key Historic District is a U.S. historic district ( designated as such on March 16 , 1990 ) located on Pigeon Key in Florida . The district is off U.S. 1 at mile marker 45 . It contains 11 historic buildings and 3 structures . Although the old Seven Mile Bridge crosses over the island , it and its exit ramp to the island were closed in 2008 . Since then , access has been by ferry or private watercraft only , but in 2014 FDOT approved a $ 77 million plan to restore it . - The Gulf of Mexico is an ocean basin largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. The U.S. states of Alabama, Florida, Louisiana, Mississippi and Texas border the Gulf on the north, which are often referred to as the "Third Coast" in comparison with the U.S. Atlantic and Pacific coasts, or sometimes the "south coast", in juxtaposition to the Great Lakes region being the "north coast." One of the gulf's seven main areas is the Gulf of Mexico basin. - The Atlantic Ocean is the second largest of the world's oceans with a total area of about . It covers approximately 20 percent of the Earth's surface and about 29 percent of its water surface area. It separates the "Old World" from the "New World". - The Florida Keys are a coral cay archipelago located off the southern coast of Florida, forming the southernmost portion of the continental United States. They begin at the southeastern coast of the Florida peninsula, about south of Miami, and extend in a gentle arc south-southwest and then westward to Key West, the westernmost of the inhabited islands, and on to the uninhabited Dry Tortugas. The islands lie along the Florida Straits, dividing the Atlantic Ocean to the east from the Gulf of Mexico to the northwest, and defining one edge of Florida Bay. At the nearest point, the southern part of Key West is just from Cuba. The Florida Keys are between about 23.5 and 25.5 degrees North latitude. - The contiguous United States consists of the 48 adjoining U.S. states plus Washington, D.C. (federal district), on the continent of North America. The term excludes the non-contiguous states of Alaska and Hawaii and all off-shore United States territories and possessions, which include American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands. - Moser Channel is the deepest passage spanned by the Seven Mile Bridge and is one of four predominant passages in the Florida Keys which allow exchange of waters to the north and west of the Keys (including Florida Bay and the Gulf of Mexico) with the Atlantic waters of Hawk Channel and the Florida Reef to the south and east. Moser Channel has an orientation perpendicular to the bridge. The other three Keys passages important to the exchange of south Florida coastal waters are Long Key Channel, Channel 5, and Channel 2. - Cuba, officially the Republic of Cuba, is a country comprising the island of Cuba as well as Isla de la Juventud and several minor archipelagos. Cuba is located in the northern Caribbean where the Caribbean Sea, the Gulf of Mexico, and the Atlantic Ocean meet. It is south of both the U.S. state of Florida and the Bahamas, west of Haiti, and north of Jamaica. Havana is the largest city and capital; other major cities include Santiago de Cuba and Camaguey. Cuba is the largest island in the Caribbean, with an area of , and the second-most populous after Hispaniola, with over 11 million inhabitants. - Alabama is a state in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama is the 30th-most extensive and the 24th-most populous of the U.S. states. At nearly , Alabama has one of the nation's longest navigable inland waterways. - Florida (Spanish for "land of flowers") is a state located in the southeastern region of the United States. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia, to the east by the Atlantic Ocean, and to the south by the Straits of Florida and Cuba. Florida is the 22nd most extensive, the 3rd most populous, and the 8th most densely populated of the U.S. states. Jacksonville is the most populous municipality in the state and is the largest city by area in the contiguous United States. The Miami metropolitan area is Florida's most populous urban area. The city of Tallahassee is the state capital. - A bridge is a structure built to span physical obstacles without closing the way underneath such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that each serve a particular purpose and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it. What is the relationship between 'pigeon key historic district' and 'monroe county'?
The answer is:
located in the administrative territorial entity