Where condemned pirates met their grisly end at the gallows on the River Thames.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

The Tudor-style cottage in the middle of the square is not quite what it seems.

The world's longest continuously running show has played at this small West End theater since 1974.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

A mysterious shape catches the eye in this 16th-century painting.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

This ancient Egyptian obelisk still bears the wounds of World War I.

The bronze uniforms commemorate the vital role of women during World War II.

Giant, friendly pelicans in Central London, the most unlikely of places.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Where visitors can play more than 150 retro arcade games.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

One of the country's largest diving schools set in a picturesque nature reserve.

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

Three tiny islands in a Portsmouth pond are at the center of disputed land claims from a number of competing micronations.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.