An extensive collection of ancient Egyptian artifacts and mummies.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Giant sand sculptures of famous people and places are on display near the Tottori sand dunes.

An enigmatic modern marker left next to a historic Roman site.

An architect transformed this abandoned cement factory into his castle-like workshop.

The hollow trunk of this 650-year-old tree was used as a hideout by two Jewish brothers during World War II.

An institution dedicated to curiosity, logic, riddles, and Mongolia's long history of puzzles.

A Himalayan monastery claims to have a piece of a centuries-old abominable snowman.

This art center is way beyond your average pumpkin-carving operation.

The Arctic Circle runs through this isolated spot north of Iceland.

Trace the history of writing at this unusual North Carolina destination.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

The whimsical construction on the roof has given rise to many a Montgomery myth about its contents.

Underground vaults of a former brewery beneath Brooklyn's Crown Heights are now used to ripen cheese.

This cuddly rodent has a place of honor at a Russian institute for genetic research.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

Possibly the world's oldest rug, this Egyptian relic is woven entirely from ancient cat hair and once carried a mummified human foot.

The world's largest squirrel statue clutches a pecan bigger than your head.

Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

The laboratory where the Soviet secret police invented exotic poisons used to kill dissidents in hideous and (mostly) untraceable ways.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.