Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

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

Thousands of well-dressed mummies below a monastery.

The Rozenberg wind wall in South Holland makes for smooth sailing through the Calandbrug canal.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

The celebrated eyesore created by starry-eyed sweethearts.

This demon atop the Notre-Dame de Paris looks utterly bored.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The ancient latrines of the Greeks, in all their public glory.

Roman ruins top white travertine terraces formed by ancient hot springs.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

This little Greek plateau is home to thousands of rustic, white-sailed windmills.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.