Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

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

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

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

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Remnants of a Victorian garden feature sitting in public woodland.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

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

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

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

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

An unusual round church in London with a Templar past.

The unbelievably opulent home built for an infamous newspaperman.

Science fiction's grandfather has a fittingly marvelous tomb.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

Life-sized painted illusions let pedestrians blend in with the street art.

A 19th-century architectural wonder designed by the "father of the skyscraper."

Home to the world’s oldest seismograph and a four-ton steel ball that makes its own earthquakes.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

An army of sleeping knights sculpted by a self-taught local artist beautifully depict an old Czech legend.