Giant topiary dog once played a role in a terrorist bomb plot.

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.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Death rituals and sacrifice inside a Peruvian megalith.

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

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Natural saunas fed by volcanic heat.

Three hundred years of preserved Spanish colonial history in San Antonio.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

This little slice of old Jerusalem in Oklahoma is the evolution of a 90 year old passion play.

When you can afford only half a road, you build only half a road.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

This former mining town was named the most toxic town in America.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

An inspired museum dedicated to the patron saint of enslaved people, inside the cloisters where he lived and died.

Tijuana's legendary jai alai or "basque ball" palace is now a massive music venue.

Hotel designed around a 16th century Mexican bullring.

The famous artist couple lived and worked here, in two different houses separated by a bridge.