Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

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

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

Eclectic final resting place of the controversial explorer.

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

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

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

A historic house left in "dramatic still life."

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

An unusual round church in London with a Templar past.

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

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

This South London cemetery holds the remains of more than 15,000 people.

A kaleidoscopic warehouse-maze of handmade neon signs.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

An enormous and lavish Gothic church in Czechia.

Monument to a suicide protesting the Soviet invasion.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

A saintly relic hidden in a Prague church basement.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.