Former farm staffed by mental patients is now a public park.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

A tree full of wishes and footwear.

The final resting place of the world's first nuclear reactor.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This legendary city has been a tourist attraction for centuries.

One of Ireland's most infamous prisons for rebels including men, women and children.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

A creepy steel gremlin has protected the Bay Bridge since 1989.

Petting this mysterious iron monkey supposedly brings good luck.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

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

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

100-year-old shipwreck you can walk up to at low tide.

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

The only museum of sake in the United States is nestled in an unlikely California college town.

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

A storybook European village in Berkeley.

Law-protected wreckage serves as a peculiar memorial for an almost forgotten World War II tragedy.

'Cause the fence start shaking, the earth was quaking.

Where the polar bear watches over everything, and every drink is a double.

Where Nor'easters go to die.

The former Naval shipyard is open for exploring - mostly.