A naturally occurring amphitheater carved by erosion into the mountainside.

For more than two centuries, the canopy of this venerable tree has been a haven for songbirds and lovers.

Europe's oldest still-operational tea farm also boasts a spectacular view.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

A micronation on an islet along the coast of a Portuguese island.

A cluster of granite granaries perched on stilts.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

This small chapel is built of human bones and decorated with a golden skeleton.

The bronze uniforms commemorate the vital role of women during World War II.

It celebrates a very stinky task and salutes London's fatberg-vanquishing team.

A fully functional, 200-year-old remnant of the time when Brixton was mostly fields.

London's marvelous wildfowl reserve along the Thames.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

A network of concealed passageways lies within a busy London Underground station.

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

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

The largest falcon hospital in the world, caring for over 6,000 feathered patients every year.

The world's largest frame offers spectacular views of the city's past and present.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

This vessel is believed to be the oldest operating fireboat in the world.

Every dish is blessed in this basement eatery beneath a Hare Krishna temple.

This impressive scene portrays the elusive forest giraffe of Central Africa.

This morbid scene depicts the Darwinian drama of death on the African savannah.