Echo Lake (formerly, Echo) is a small unincorporated community in El Dorado County, California, United States, along U.S. Route 50 in the mountains of the Sierra Nevada.
 It is 1.5 mi north-northwest of Echo Summit.
 Echo Lake's nearest neighboring town is Little Norway.
 The ZIP code is 95721.
 The community is inside area code 530.
 The elevation of Echo Lake is 7539 feet (2298 m).
 The average snowpack per year is 10.5 feet, with over 15 feet of snow depositing in certain areas.
 Precipitation and accumulation at Echo Lake can be found in California Data Exchange Center stations located at Echo Peak (EP5) and Echo Summit (ECS).
The Three Sisters are three rocky islands in the Potomac River in Washington, D.C., west of the Key Bridge.
 A notable landmark in colonial times, the islets are less well known as the Three Sisters Islands and Three Sisters Island.
Three Sisters is a 1998 opera by Péter Eötvös to a Russian libretto by Eötvös and Claus H. Henneberg based on Chekhov's "Three Sisters".
 The premiere at the Opéra National de Lyon was directed by Ushio Amagatsu.
 Amagatsu's staging of "Three Sisters" was restaged in the 2001-2002 season at Théâtre du Châtelet in Paris, at Théâtre Royal de la Monnaie in Brussels, at Opéra National de Lyon, and at Wiener Festwochen 2002 in Austria.
Echo Point is a lookout about 2 km south of Katoomba, New South Wales, Australia.
 It attracts an estimated 1.5–2 million visitors each year.
 The lookout offers a view to Three Sisters, Mount Solitary and the rock formation known as the Ruined Castle.
 A short walk from Echo Point leads to The Giant Stairway which provides access to a number of nature walks through Jamison Valley.
The Three Sisters are unusual rock formation in the Blue Mountains of New South Wales, Australia, on the north escarpment of the Jamison Valley.
 They are close to the town of Katoomba and are one of the Blue Mountains' best known sites, towering above the Jamison Valley.
 Their names are Meehni (922 m), Wimlah (918 m), and Gunnedoo (906 m).
The Needles are a series of massive granite rock formations rising up from the North Fork of the Kern River near its junction with the Little Kern River.
 The Needles Lookout is located 2.5 miles off the Western Divide Highway (State Route 190) 10 miles north of Mountain Road 50.
 Johnsondale, California is the nearest town, with the Camp Whitsett, BSA camp around 4 miles from Johnsondale.
 On July 28, 2011, the Needles lookout, constructed in 1937-1938 by the Civilian Conservation Corps, was destroyed in a structure fire.
 The lookout tower stood atop the rock formation at 8,245 feet.
Robin Hood's Stride (also known as Mock Beggar's Mansion) is a rock formation on the Limestone Way in Derbyshire close to the village of Elton.
 The nearest town is Bakewell, to the north.
 The popular tourist spot can be accessed via the Limestone Way just off the B5056 between Haddon Hall and Winster, or from the unclassified road from Alport to Elton using either the Limestone Way, a concessionary footpath or Access Land.
 Both options have limited parking at the side of the road.
The Flats is a neighborhood located in the southeastern end of Woodbridge, Connecticut, in the West River valley Amity area that runs between the hilly western part of town and the rock formation known as West Rock.
 It also borders the city of New Haven, and specifically the neighborhood of Westville.
 The valley of Amity is an area located partly in the town of Woodbridge, Connecticut and partly in the city of New Haven.
 It is bounded on the northeast by the West Rock ridge, on the south by the Westville neighborhood of New Haven, and on the northwest by an incline in elevation above which lies the highlands of Woodbridge, Connecticut.
 This region was called “Shushuck” by Native Americans.
Coloured Canyon (Arabic الوادي الملون) is a rock formation on Sinai peninsula.
 It is a labyrinth of rocks, some of them have about 40 meters.
 The canyon is almost 800 meters long.
 The nearest town to the canyon is Nuweiba.
 It is about 90 km north of Dahab.
The Three Sisters are a complex volcano of three volcanic peaks of the Cascade Volcanic Arc and the Cascade Range in the U.S. state of Oregon.
 Each exceeding 10000 ft in elevation, they are the third-, fourth-, and fifth-highest peaks in the state of Oregon, and are located in the Three Sisters Wilderness, about 10 mi south of the nearest town of Sisters.
 Diverse species of flora and fauna inhabit the area on and around the mountains, which is subject to frequent snowfall, occasional rain, and extreme temperature differences between seasons.
 The mountains, particularly South Sister, are popular for climbing and scrambling.

Question: What is the nearest town to Echo Point and the rock formation known as the Three Sisters?
Answer: Katoomba