The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

The world's largest wooden structure.

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

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The house where the writer spent his formative years.

A stunning Victorian abbey and walled garden on a lakefront.

The modern birthplace of Irish freedom.

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

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

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

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

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

Where the lovelorn find a home for their sentimental keepsakes.

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

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

Gargoyle head that brings good luck.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

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