This picturesque medieval monastery guards a small trove of historic treasures.

An ancient knight and a symbol of the city's freedom.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

An ethereal glowing blue ocean cave in Croatia.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

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.'

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Home to three historic ships from the age of Vikings.

This 13th century Gothic brick castle is the largest in the world by surface area.

Relive a Polish uprising via an enormous, century-old cyclorama.

The silly symbol for an underground protest group is now scattered around the city.