Cat art as far as the eye can see.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

The "Key of Keys" for Washington, D.C. and the apocryphal landing place for the military campaign that started George Washington's career is now at the bottom of a well.

Press 1 for knock-knock jokes.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Step into a pastel time capsule where candy is truly dandy.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

In the early 1800s, surgery was also a show.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

An outlandish shoe shaped house built by an eccentric millionaire.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

Dr Barnes' $25 billion private collection of art and arboretum.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

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

The abandoned coal loading dock is a canvas for unsanctioned art.

This might just be the TARDIS of bookstores.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.