This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

At 207 feet, one of the world's longest continuous escalators.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Elevated freight railway turned wildly successful urban park.

Famously misunderstood wonder of the ancient world

A giant Troll lurks under one of Seattle's oldest bridges.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The celebrated eyesore created by starry-eyed sweethearts.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Medicinal spa created with the discharge from a geothermal energy plant.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

San Francisco's newly reopened hands-on science museum.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The only theatre in the world constructed specifically for sound movement.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

An essential stop before plundering, BYO Cutlass.