This snug medieval lane is one of the narrowest streets in the world.

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

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

Several 12th-century ruins can be found inside this historical market.

This 13th century Gothic brick castle is the largest in the world by surface area.

A striking public sculpture representing the period of martial law in Communist Poland.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

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

The storied steakhouse is the last in a long line of Lebanese-owned supper clubs in Tulsa.

Nature's biggest mammal swims in landlocked Oklahoma.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

This sculpture honors the man who was known as the "Righteous Among the Nations."

A diminutive statue that was inspired by the sculptor's own daughter.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.