Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Legend says one of the world's largest marine geysers is actually a whale that got wedged within the rocks.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

The world's largest collection of materials relating to lesbian history is housed in a Brooklyn townhouse.

Sniff the Titan Arum's rotting flesh.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

The world's largest piece of copyrighted artwork.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

Stairs often replace streets on the steep slopes of this old mining town.

What is the Thing?

A reproduction of earth's many biomes.

Take a dip in the world's largest mineral hot springs pool.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

The highest bridge in America was built for an almost unnervingly small amount of money.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

An art deco ice cream shop covered in vintage tiles.

Like Mardi Gras, only everyone's a pirate.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A mysterious castle built as a monument to lost love.