Half of a waterfall goes into the river while the other half seems to disappear.

A (slightly) grownup take on the classic retro arcade.

An underground magnet for ever-changing street art.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

Bad farming practices caused this unnatural natural wonder.

Faces carved into the cliffs create an otherworldly walking trail.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

Visit this playground of waterfalls, caves and sinkholes.

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

The first declared National Monument in the United States.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Order scoops of pandan, lychee, and black sesame at this family-run institution.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.