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

This Franklinford, Australia site was once home to one of the remotest churches of its faith—in the fictional world of the Kcymaerxthaere.

The King is honored by an elaborate grotto on a continent he never visited.

The labyrinthine storm tunnels beneath the city of Melbourne are ruled by a band of urban explorers.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

A tongue-in-cheek arcade where the games are based on everyday life.

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

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

Banksy gives themself artistic license with this piece of London street art.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

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

Hidden beneath the streets of London is a secret subway that only carried mail.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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

A kaleidoscopic warehouse-maze of handmade neon signs.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

The world's smallest commercial theater is set up in what was once a urinal for Victorian men.