This striking otherworldly landscape outside Angola's capital city is the product of millions of years of erosion.

Did Gustav Eiffel design this enigmatic metal building?

The first island in the world designated a light-pollution-free astronomical observation point.

This operational mill has survived centuries of destruction and construction.

A humble homage to a gravedigger tucked within the dignified English cathedral.

An inverted staircase above the entrance to the Bethnal Green Underground Station functions as a memorial for people who lost their lives during the worst civilian disaster in the U.K. during World War II.

Inside the Finchingfield Guildhall, two sticks that belonged to alleged witches in the 17th century.

Through seven years of burglary, bereavement, and bad luck, a gentleman kept his word by saying none.

This reconstructed Norman castle is the world's most accurate, from location to livestock.

The grave of the mythical giant who stole from wealthy bakers to give to the poor.

A knight said to have slayed a dragon with the help of his winged dogs is buried inside the walls of a church.

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

Three small rooms at the back of the “official” church of London's clowns.

A hidden path at the National Theatre lets you look behind the scenes of the latest productions.

The world's oldest optical museum is an odd collection where the exhibits look at you.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

In this recreational park, two artificial lakes share a surprising connection to Wembley Stadium.

A vintage media store and safe haven for cinema buffs who love 16mm films shown on vintage projectors.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

How did a fuel storage container become one of the most famous sights in the sporting world of cricket?

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

Human-made caves excavated to hide a secret society of wealthy pagans.

The final resting place of a miniature monkey.