A secret climbing tree hides along the side of a Costa Rican road.

Columbus' failed colony in the New World.

The first hospital in the New World.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

270 million year-old forest of stone.

These layered sandstone mountains in China look like they are made of pressed crayons.

Intensely colorful calcite pools in Southern China.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

Home to items never before seen by the public.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

This painted blacktop brings the classic arcade game to life.

Couple's personal collection of pinball machines turned public pinball museum.

A whimsical village of unique treehouses resides in a Washington forest.

A treasure trove of rare and fine fabrics from around the world.

The "original web site," this farm in Northern Vermont encourages orb-weaver spiders to build their daily webs, and then sells the preserved masterpieces.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Dig for your own trilobites in this goldmine of invertebrates.

In the late 1990s, a mechanic and fan bought this iconic sportscar back from the dead.

One part antique store, one part curiosities hodge-podge.

A modernist landscape of water and sci-fi concrete.

This historic train station has been converted to a locomotive themed hotel.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.