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

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

How did an Australian statue of the Bard of Avon end up in the Hungarian capital?

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

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

The last king of Poland was interred in this church nearly 200 years after his death.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

This bridge was constructed from the rubble of the infamous Bastille.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Where members of the Crossbow Corps of San Marino demonstrate their skills.

Breathtaking and huge 430 year old maps of Italy.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

Featuring the last fully walkable parapet walkway in Europe.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

One of the tallest lighthouses in the world also serves as a monument to the fallen of World War I.