These submerged sculptures create a new habitat for marine life and exciting diving experience.

This shrine commemorates the site of the first known Catholic mass in the United States.

Once believed to be a sacred Roman legionary symbol, this bronze figure inspired the 1954 novel 'The Eagle of the Ninth.'

These mosaics were created more than half a millennium ago and feature various animals.

An underground spring in a labyrinthine cave system, decorated with stalagmites and stalactites.

Welcome to the home of the world's largest typewriter company.

A former drinking water storage reservoir transformed into a sunken garden.

The biggest cave system in the Arabian Peninsula is home to a rare variety of blind fish.

More than 100 antique vending machines housed in a used tire shop sell everything from candy to sake and ramen.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

A mural and a few historical markers commemorate Denver's once-thriving Chinatown, which was obliterated in a racist riot.

This jar honors the role that pottery has played in this Tunisian village over the past millennia.

The last street gas lamps in Hong Kong.

Above the door of a house, a plaque claims to commemorate the future living place of the inventor of time travel.

A vertical tube that allows you to see what's going on underneath the Antarctic sea ice.

The top of the holy mountain for the ancient Spartans looks like a pyramid—is it man-made or a natural phenomenon?

This room of wonder is full of relics, from knights in armor to rare works of art.

Ch-Ch-Check out the world's largest hand-painted 3D mural.

An ancient relic in Edinburgh that is around 4,000 years old.

A menagerie of concrete animals brought together from across New York City's parks.

These whimsical rabbit figures are not as innocent as they might look.

A haunted slate mine turned concert hall and a hidden fairy garden.

Home to works by notable Mexican artists and an underwater mosaic of the pre-Columbian goddess Gaia.

This taberna has been frying up crunchy salt cod since 1860.