Mineral springs believed to hold therapeutic properties draw in visitors from all over.

A toxic lake near a volcanic caldera that is home to flamingos and other life.

The gorgeous murals at this open-air museum form the largest street art collective in Chile.

The “City of Stairs” sits high in the Andes, above the world’s largest underground copper mine.

A fantastical and futuristic temple of light built from nine monumental glass veils.

An ancient Greek physician is honored as a god at this hole-in-the-wall shrine.

This ”skyspace,” which bears a resemblance to a spacecraft, is designed to disappear in the presence of light.

Roman ruins top white travertine terraces formed by ancient hot springs.

This tiny shop has been serving traditional tamales for more than 200 years.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

This gravesite in the Amazon Rainforest was left behind by a failed Third Reich expedition.

A crypt believed by many Congolese to be a center of black magic.

A memorial to Brazil's little-known role in World War II.

One of the largest, grandest imperial mausoleums was built as the founder of the Ming Dynasty's final resting place.

This cauldron was said to be hidden inside a church after it was borrowed from a local witch.

A street in front of NASA's D.C. headquarters has been named in honor of the Black women who were essential to early spaceflight.

The history of central Minnesota under one roof.

A sun-filled museum featuring an ever-rotating collection of classic and exotic cars.

This educational and eco-friendly community is Iceland's "home of the sun."

In the recreated studio of a visionary artist, a stone that may be more than meets the eye.

A museum entirely dedicated to Bergamo’s tradition of puppetry.

This museum is filled with an eclectic collection of unique inventions.

An unusual museum home to a vast collection of items that represent everyday life.

A monument commemorating the lives lost when a plane crashed into Mount Macedon in 1948.