The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

This unique building in the main square stands out among the city's typically Baroque architecture.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This massive blockhead sculpture hides an entire library.

The celebrated eyesore created by starry-eyed sweethearts.

This emotive sculpture was originally created for the 1878 World's Fair.

The video game-themed street art first popped up in the French city.

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

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This museum houses an imposing skeleton army comprised of creatures great and small.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The remains of this misplaced church were moved here stone by stone.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

A pair of gigantic baby heads greet passengers at Atocha Station.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Commonly acknowledged as the only public monument to the Devil himself.