A peace symbol in Northern Ireland is among the world's largest hedge mazes.

This 18th century mansion played Winterfell in Game of Thrones.

It was once nicknamed "the most bombed hotel in Europe."

One of the most easily accessible examples of the rare 1960s UFO houses.

An unofficial monument to the late King of Pop sits at the base of a Renaissance composer's statue

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

A giant snail sculpture looking longingly at the German traffic museum.

A stairway to heaven, or to nowhere at all.

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

The colonial city's social history is reflected in its fanciful door knockers.

A moody and picturesque riverside ruin overgrown with vegetation.

A well-preserved, 19th-century Irish workhouse recounts a grim time in the country’s history.

Outside an Irish football stadium are murals commemorating history and local heroes.

The eyes and ears of this tower keep watch over Malta’s Grand Harbor.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

Both the World War II Allied Forces and NATO have used this modern bunker underneath Malta’s capital.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

Belfast's namesake river still winds below the city center, hidden from sight.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

A domino effect created with Britain’s iconic telephone boxes.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.