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

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A friendly pub with a sordid past in cock fighting.

Victorian-era Londoners really wanted to believe this 17th-century cistern was actually an ancient artifact.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Dictionary Johnson’s favorite feline.

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

The taxidermied remains of a once-great parrot.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

A historic arboretum and non-conformist, non-denominational park cemetery.

It took 28 years to build this massive statue of the Hindu god Vishnu riding a mythical bird.

A haunting theme park is slowly being swallowed by the jungle.

A curious cave church carved into the face of a cliff.

A tiny church on a man-made island in the Adriatic.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

An ancient knight and a symbol of the city's freedom.

Gargoyle head that brings good luck.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'