This abandoned sea fort has become an accidental bird sanctuary.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

An abandoned stretch of highway, deteriorating next to the operational one.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

The span is crooked and made from two older recycled bridges.

There's a crumbling old mansion inside the Smithsonian National Zoo.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

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

This ghostly Alaska village still clings to a steep cliffside despite having been abandoned for over 50 years.

This Indonesian village was revitalized by a vibrant rainbow paint job.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

Hindu temple of the dead home to hundreds of long-tailed macaques.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

One of only two commuter aerial tramways in the United States.

A popular swimming hole that hides one of America's most deadly diving spots.

A modernist landscape of water and sci-fi concrete.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

Walk 2,300 feet above the ground on the "Troll's Tongue."

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.