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

The secret city built by the Manhattan Project.

A colorful square marks the heart of the city's LGBTQ community.

This angular brutalist playground turns playtime into modern art time.

Jule Körner's house full of bizarre architectural details.

The only presidential monument to display a late POTUS's actual casket.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

Medical history museum featuring a lovely doctor's office from the 1800s.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The mark of the Devil's horns on a marble column in Milan.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Climb inside an iron crystal magnified 165 billion times its normal size.

A little sculpture with a large wardrobe.

Go inside to really appreciate this 500-year-old technological masterpiece.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Enormous lake at the bottom of a unique cave system.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The prototype for all Nazi concentration camps.

The footprint of a frustrated devil in Munich's Cathedral.