Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Two stunning 17th-century libraries and a cabinet of curiosities.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Ruins of a German Castle on top of a towering stone pillar.

One of the newest mosques in a city filled with thousands.

A sixth-century Byzantine cistern hidden below a modern carpet store.

1513 Turkish world map, full of European state secrets and snarky commentary.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A meow-velous tribute to a beloved street cat, made famous on the internet.

The ornate miniature mansions were built for Istanbul's feathered residents.

A marvel of Byzantine engineering under the streets of Istanbul.

This strange statue depicts a young boy's body with an adult Mozart's head and a single wing.

A peculiar samurai statue overlooks the center of Brno.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

A Baroque mansion with ties to legendary magicians and alchemists.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

Europe's second largest ossuary wasn't discovered until 2001.

A church of bones, decorated with 40,000 human skeletons.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

Hundreds of thousands of ancient documents offer a unique glimpse into Jewish life in Cairo.