This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

A statue commemorating a beloved stray dog who was adopted by the entire neighborhood where he lived.

The beautiful baroque library of the Hapsburg empire.

On Gellért Hill, this statue depicts the tragic tale of lovers divided by the Danube.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Bohemian paradise covered in majestic forests.

Art Nouveau painter Alphonse Mucha spent 18 years creating these monumental paintings of Slavic history and mythology.

Heralded as one of the prettiest castles in all of Czechia.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

A massive, abstract lookout tower providing a panoramic view of Prague.

This spooky statue sits outside a famous Prague theater.

This unique house, the only one of its kind in Brooklyn, was built as part of a real estate developer's showcase.

A mocking tribute to the past and modern leadership of Prague.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A Jenga-style cylindrical tower of books that appears to go on forever.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A hip bar decorated with walls of golden skulls.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.