Derelict chemical plant on the North Sea is a beautiful industrial ruin.

A collection of grotesques lines the walls of this Italian villa.

Thousands of well-dressed mummies below a monastery.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

Every inch of this chapel is covered in craftsmanship from across the world.

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

An abandoned shopping gallery built during Fascist Italy tucked in the center of Palermo.

A study of Fascist era Art Deco design in Italy.

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

Haunting graffiti left by prisoners of the Spanish Inquisition.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

The townhouse where the English poet created some of his most influential work has been preserved in tribute.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

The remains of the great moral philosopher reside in a university in London.

A open air theatre built on a cliff by an eccentric British woman.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

London's largest outsider art museum.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Collection dedicated to brands, packaging and advertising.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

Fascinating town where normal life interfaces with the occult.

London's old-school healing garden.