Tucked into Pittsburgh’s North Side, the Mattress Factory is a labyrinth of permanent, room-sized installations where artists transform entire spaces into mind-bending, immersive worlds.

Experience the pivotal Civil War battle at this interactive museum.

A T. Rex statue dressed as Mister Rogers honors the children’s-television pioneer.

A surreal, interdimensional shopping center and portal to another universe by Meow Wolf.

Seven centuries ago, its holy door opened for a forgiveness procession ritual that was later "copied" by the formal Catholic Jubilee.

A bizarre example of collective behavior resulted in thousands of shoe prints in Vegas parking lots.

This 500-meter-long memorial pays tribute to the hundreds of thousands of lives lost to COVID-19 in the UK.

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

A wooden rollercoaster that still delivers a thrill.

A private residence adorned with a gorgeous mural dedicated to the buzzing insect.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The drama of nature in full effect in this Nevada State Park.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

Nothing says indulgence like a 1,500-pound chocolate castle.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Tiki luxury on Nob Hill.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The site of the climactic scene from the classic horror film is now a historic landmark.

The only Leonardo Da Vinci painting in the Western Hemisphere.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.