The largest geyser field in the southern hemisphere is a spectacular sight.

A massive display of meteorites all found in the Atacama Desert.

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

Full-scale dinosaurs dominate the forested park in the middle of Chile’s second city.

One of Chile's most active volcanoes is riddled with beautiful caves.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

The collection of a paranormal investigator who traveled the country collecting haunted items and stories.

A mine in the Sierra Nevada that produced nothing but barren quartz.

A natural wonder in south Denmark.

A spiralling hourglass-shaped tower rises from the forests in Denmark.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

Rare recess caves fill this unbelievably beautiful Ohio park.

Covering 37 subterranean acres, this Armillaria gallic is a famous fungus with its own festival.

Largest outdoor staircase in the United States.

Strange physical sensations and optical contradictions keep visitors coming back for more.

Taxidermy and miniatures come together to create this unique museum.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

The park is home to the United States's only still-operating Dutch windmill.

Introducing the Green Fairy to her fawning masses.

The curiosities and wonders of pharmacy in a delightful historic building.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.