One of the best-preserved medieval streets in Europe.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

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.

Tour the sci-fi-esque reality of governmental disease management.

This medieval castle was reconstructed by Carlo Scarpa.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

Pilgrimage site for star-crossed lovers.

Something's missing between the arcades of the Palazzo della Ragione in "the city of the three withouts."

One of the largest squares in Europe contains an entire artificial island.

This palace offers an 18th-century European take on Chinese design and architecture.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

This amazingly preserved Doric temple was abandoned before it was ever completed.

According to Greek mythology, this natural spring is the home of a freshwater nymph.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

Abandoned hangar from a forgotten part of aviation history, along the Ticino River in Lombardy.

Every inch of this chapel is covered in craftsmanship from across the world.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.