The sumptuous ceiling was one of the last things Charles I saw before his execution.

An ornate and disused early 20th-century building has been given new life as a fully operational structure, complete with offices, oyster bar, and a furniture retailer.

According to legend, this tomb holds the secrets to time travel.

A mineral spring that became all the rage in 17th-century England.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.

An archive of ceramic eggs painted to record clowns' personal makeup designs.

The world's first indigenous rooftop farm boasts 2,000 plants from more than 35 different native Australian species.

From the late 19th century until the 1960s, these stone-lined "stumps" were a popular place for people to air their views on local and international issues.

A set of seven houses, each built in a style that represents a European country.

An art gallery, studio, and shop that celebrates death.

This educational institution and reference library specialize in the psychic arts and mediumship.

Tiny artwork tucked within glass letterboxes form this hidden gem of an art gallery.

East London art gallery showcasing contemporary art from Europe's Eastern Bloc.

"Purveyors of traditional sweets and vintage treats."

Historic cuisine meets fine dining in a hotel-restaurant overlooking Hyde Park.

Behind one of the world's most impenetrable vaults is a massive collection of retail silver.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

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

Worship at the altar of seafood at this fish-and-chip shop housed inside the town's oldest stone church.

This drowning bronze monument marks the spot where one of Australia's great engineers died by suicide.

This pair of Australian "waterfalls" appear to be falling straight across the land.