A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A Rodeo for Prisoners.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

The rocks in this arid basin leave trails of movement behind them.

A trash dump made beautiful by nature's power.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

The largest drain hole in the world.

An invitation-only museum of items natural and bizarre, arcane and exotic.

Fish raining from the sky are the cause of a yearly celebration in this small Honduran town.

A 300-ship graveyard, with a few still visible at low tide.

A winding path built in secret on the edge of the continent.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A monument to the love people have for their pets.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A hidden subterranean installation offers a view of the sky.

Spiral labyrinth hidden in the hills above Oakland, CA.

Cows on a ranch are commonplace, scattered cow bones everywhere? Not so much.

A ruined hotel with an unlucky history and an eerie present.

Radioactivity still cause for concern at this urban explorer's paradise.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

A large instrument played by the wind.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The only theatre in the world constructed specifically for sound movement.