Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

Built in France in the 1400s, this gothic chapel now resides at Marquette University in Milwaukee, Wisconsin.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Three playfully immersive mini golf courses let you travel alongside your ball to the cup at this facility, which has been around since the 1950s.

This forgotten beach house built to look like a Frank Lloyd Wright masterpiece overlooks a hidden beach.

This storied music venue was once a tavern that housed an Italian Anarchist book club and prohibition parties; today it's a community space for artists and musicians.

A Milwaukee museum provides an unsparing and ultimately empowering look at the Black American experience.

A group of artists transformed this desolate city alleyway into an outdoor gallery of street art.

Statue dedicated to the star of an old television show.

A dazzling display of lights and crystals.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

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

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

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

The angel of death appears to weep black tears at this grave marker.

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.

Every president in history is immortalized in bronze in downtown Rapid City.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

10,000 flowered plants bloom in the City of Roses.