A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

One of Ireland's most infamous prisons for rebels including men, women and children.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

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

Museum dedicated to the terror regimes of Hungary.

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

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

An intricately decorated tiny place of worship.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

One of the world's smallest prisons boasts just two small cells.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

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

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

Gargoyle head that brings good luck.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.