This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This mid-century mural portrays humankind's spiritual and scientific journey.

The former headquarters of Mexico's Secretariat of Public Education now houses a muralism museum, including Diego Rivera's first large-scale mural project.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

A museum in the former home of Marxist revolutionary Leon Trotsky.

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

Twelve natural mummies are displayed in the crypt of this former monastery school.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

Miraculous tree that seems to sprout out of solid rock.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This hot dog-shaped diner has moved all around Colorado, but has never been to New York.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Explore some of the most unique vehicles in history along with a cast of unsettling mannequins.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.