Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A well preserved medieval fortress in Vojvodina.

A giant portrait of an ancient king looms over the river.

Stone age urban planning.

A Roman monument to their own civil engineering prowess.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

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

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This dazzling Art Nouveau mansion is now home to the Modern Art Gallery Subotica.

An idyllic traditional timber village on a picturesque hill was built for a film.

Baroque celebration of the end of the Great Plague of Vienna.

The partially submerged ruins of a white marble quarry used in ancient Greece for over 1,200 years.

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

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

This ancient theater was once the home of fierce gladiatorial battles.

Pilgrimage site for star-crossed lovers.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Op-art architecture designed for happiness.

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