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

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Tiki luxury on Nob Hill.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Home to three historic ships from the age of Vikings.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Huge stone depressions which may have acted as an Incan agricultural experiment.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

A massive, heart-shaped, wind-carved crater in the middle of the Israeli desert.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

It houses the remains of a 17th-century version of the Titanic.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

This former coal gasification plant found a curious second life as a popular public park.

A wall of chewing gum moonlights as collective art.

A hot dog stand where the heads are just as hot as the dogs.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Ice cream stand, snack bar, and time capsule of milk conveyance.