The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A community of collapsing homes more than a mile out from the Florida coast.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

An underwater statue of Christ blesses the depths off Key Largo.

Where monkeys run wild and the humans are caged.

A mysterious castle built as a monument to lost love.

An octet of classic chrome trailers speared into the ground act as a tribute to the silver bullets of the open road.

Electrical pylon in the shape of Disney's beloved mouse.

One man's ambition created this psychedelic log home.

The first declared National Monument in the United States.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

A town's monument to a touch-football victory 50 years in the making.