The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Less a museum than a bizarre fantasy world created by artists and engineers.

Take a break from all the boring business of death at this funeral home mini-golf course.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Step inside Lucy, the world's largest "elephant."

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

It would take 35 firetrucks to fill this enormous glacial pothole.

Memorializing an American tragedy of massive proportions.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

These disused steel furnaces are now haunting ruins that may one day be a national park.

Steepest flood safety railway in the entire world.

Pennsylvania's own Roswell-style UFO mystery.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

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

A toxic ghost town sitting atop a massive coal fire.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.