A mysterious artist-run cabinet of curiosities and library.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

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

Remnants of a Victorian garden feature sitting in public woodland.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

This 1920s Dutch barge is now a floating bookstore.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

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

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

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

Religious structure known for its sculpted details.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

A medieval church built up to defend its village.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A stunning 18th century pharmacy and medieval chemist's collection.

Gigantic Romanian salt mines used to heal respiratory conditions.

A collection of items from a way of life that no longer exists.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This bone-filled cave got its name after they found 140 bear skeletons inside.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.