"Holy Wisdom" overlooks the city that became its namesake.

Eastern Bloc nostalgia, anybody?

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A striking symbol of the Bulgarian capital.

This historic black and white monastery is one of Bulgaria's architectural jewels.

Named for the 39 tribes that live in Oklahoma, this restaurant's menu deliciously highlights local flavors.

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

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

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

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

The surprising home of the iconic Santa Monica Pier Ferris Wheel.

A half-size replica of the World Trade Center towers above Tulsa.

This unusually circular centenarian barn became a Route 66 icon.

A small section of native wilderness on a university campus

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

An abandoned saucer-shaped monument in the Bulgarian mountains.

The largest land animal skull ever discovered.