An unsanctioned shrine that sprung up outside the late singer's home is causing a stir in London's Highgate neighborhood.

Three small rooms at the back of the “official” church of London's clowns.

A place of remembrance for the Prime Minister that met a violent end.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

A hidden path at the National Theatre lets you look behind the scenes of the latest productions.

This macabre painting of a Shakespearean scene looks like something out of a nightmare.

One of the greatest movie directors of all time lived and worked in this London flat from 1926 to 1939.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

Repository for more than 22 million pickled specimens.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

This 18th-century project to build the world's tallest gravity dam was never completed.

An iconic photograph from the Spanish Civil War saved this shrapnel-scarred historic house from destruction.

A statue commemorating a beloved stray dog who was adopted by the entire neighborhood where he lived.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

These rock drawings in the Côa Valley also create an ancient optical illusion.

This impressive rupestrian engraving dates back to the Upper Palaeolithic period.

In addition to showing films, this one-screen arthouse cinema from the late 1940s is a museum of old film equipment.

Get in line for Lisbon’s most famous sandwich.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.