A significant cache of prehistoric valuables is on display in an unassuming museum tucked inside a town hall.

This ancient rock painting is the oldest evidence of humans’ love affair with honey.

This house's itty bitty size means no humans allowed.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

Columbus' failed colony in the New World.

Collection of fossils, plants, and ancient animals encased in amber.

Each year melting snow turns these Austrian hiking trails into scuba zones.

A whimsical, but often overlooked clock in Park Avenue.

Cryptic messages embedded in the New York City sidewalk.

A massive underwater sinkhole made famous by Jacques Cousteau.

A pre-Columbian ceremonial and astronomical site built by the Taino Indians.

Enormous array of antennae fill a desert valley.

Now containing the bones of the actual conquistador, instead of someone else.

A gargantuan crystal kingdom.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

One of Chile's most active volcanoes is riddled with beautiful caves.

The competition: breathe deeply as long as you can.

A cargo of beautiful music.

Try not to get slimed in Tribeca.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A dilapidated dock tells the story of Titanic's missed arrival.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.