The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Russian history in San Francisco.

A large instrument played by the wind.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A very big rock just plopped down in the New England woods.

The largest tidal whirlpool in the Western Hemisphere.

The beams of the New College, Oxford dining hall come with an amazing story.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Northern Ireland's Brobdingnagian stepping stones.

Rusting ships sit in a desert where a sea used to be.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A beautiful but toxic fountain of mercury.

The ghostly remains of an accidental sea.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Walk the whole Mississippi River!

Direct, creative challenge to Mother Nature's winter wrath.

A one-of-a-kind collection of a unique medium.

A 140-year-old castle with underground caves hidden in San Francisco.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.