The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

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

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

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

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

The mayor made the declaration in 2004.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

Home to the deepest rift anywhere on Earth.

Jail from the 19th century that was built by inmates.

Jamestown may have been the first permanent English settlement in the Americas, but the colonists made landfall at a lesser known cape.

A symbol of Texas pride.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

A mesmerizing amount of crazy art is attached to the side of this house on Seattle's Phinney Ridge, bringing smiles to those who venture down the driveway to take a look.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

A water pumping station disguised as a residential home to assuage concerned neighbors now tricks most passersby.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Boats and fish both find their way through this massive hydroelectric structure.

This candy-striped tower is the farthest east you can go in the United States.

A mini-Stonehenge in the corner of the North Carolina state capitol grounds.