A grand entrance to one of the world's smallest Chinatowns.

This museum houses two of Mexico's most impressive Aztec monoliths.

A jewel of the Mexico city skyline now slowly crumbles after surviving an earthquake.

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

The only castle in North America to ever house European sovereigns.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

A Texas-sized secondhand bookstore features 54,000 square feet of books, music, and media.

This massive Art Deco-inspired mural was the world's largest augmented reality artwork at the time of its completion.

This 1930s-era Route 66 Tulsa landmark was moved, restored, and filled with neon.

A Route 66 filling station that was designed to resemble the Hagia Sophia, and is now the symbol of an arts district.

Tulsa's historic skyscrapers define the oil boom era of Art Deco construction, and are known for their ornate arched lobbies.

This beacon for pre-radar pilots once guided Charles Lindbergh to a safe touchdown in Tulsa.

Named after a Mexican president, who once lived nearby, this park in a residential Mexico City neighborhood packs a whole lot of history into a small space.

This underground museum highlights the history of Mexico City's subway system.

Is this 47.7-mile stretch of highway the longest straight road in the United States?

Built from oil field parts and resembling a teepee, this abandoned mid-century church is hoping for a comeback.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

This small-town museum is dedicated to the original western movie mega-star.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.