Once the home of a hermetic monk, this cave now houses a small church.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

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

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.

The headquarters of the famous Yale society.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

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

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

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Less a museum than a bizarre fantasy world created by artists and engineers.

Where the author wrote her beloved "Little House" books.

Official museum, hall of fame, and repository of the Texas Rangers.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

Turning night into day in Victorian-era Austin to thwart a serial killer.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

One part antique store, one part curiosities hodge-podge.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

This public baseball field is a beloved remainder from of one of the most historic stadiums in the country.

The pieces in this sculpture garden are made from demolished buildings that were once landmarks of Motor City.