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

There's an exclusive Beefeaters pub hidden in the Tower of London.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

This overlooked street light once served as a KGB dead letter box.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

The monster at the center of the Darwin Center Spirit Collection.

Pop culture has helped to keep this iconic British building from being destroyed.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

A relic of Victorian grandeur hides beneath a busy South London road.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A Roman spa buried deep beneath the City of London.

Abstract dinosaur models in London.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

Repository for more than 22 million pickled specimens.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

This hidden green space is the city's second largest conservatory.

The longest hedge maze in the world.

The final resting place to 300 Victorian-era pets hides inside the city park.

The anatomical-pathological collection of a man who changed surgery.

The curios of pharmacist and collector Henry Wellcome.