The summer home of the largest colony of bats in the world.

The world's second-longest burning light bulb.

Crumbling hotel echoes with the sounds of the '30s.

A gargantuan crystal kingdom.

These azure waters were thought to lead to the Mayan Underworld.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The world's newest astronomical clock is also its most accurate.

This 50-ton ship on Orcas Island has never seen the ocean.

This dilapidated ship carcass covered in trees is a striking sight.

Norway has built what may be the world's most beautiful public toilet.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

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

A black cottonwood gets a second life as a home for books.

Where the writer penned his famous story about a jumping frog.

Its dark depths conceal millions of rare, delicate crystal formations.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

A private home built to resemble the shape of a microscopic creature.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

Early prototype for Frank Lloyd Wright's Guggenheim.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

Once the gateway to the utopian dream-village of a Civil War embalmer.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

Fonts are born and bred here at the oldest letterpress type foundry in the United States.