A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

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

A misnamed well, with a deep dark past.

A pair of connected skyscrapers form this symbolic gateway.

This effigy of Peter the Great is greatly disproportionate.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

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

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

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

St. John the Baptist's forearm is housed in this remote 11th-century monastery.

Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.

The reconstruction of this prominent building fulfilled a long-written command.

The oldest housing complex in Riga is a mini timeline of architectural trends.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.

Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

The unusual sculptures are believed to be powerful political symbols.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.