The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

A huge enchanting public park just outside the ancient walls of Rome.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This enormous censer uses a pulley system installed over 400 years ago.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

The final resting place of the great navigator, or maybe his brother.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

A "miracle" that seems to produce more holy fistfights than holy revelations.

The home of the Dead Sea Scrolls is an abstract modernist dream.

The world's longest known cave system.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

This museum collects over a century of automobile history including the iconic car from The Muppet Movie.

This tremendous trout welcomes visitors to a northern Michigan town with a rich fishing history.

This missionary's legacy looms large over the Upper Peninsula of Michigan—literally.

One of the largest crucifixes in the world stands 55 feet tall in a secluded, wooded area of northern Michigan.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

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