A failed attempt to control drifting sands yielded a gnarled sylvan wonderland.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

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

Nearly 40 miles and 1,000 years of limestone mines under Denmark.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

An abandoned relic of the city's failed experiment with below ground transit.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

A real flying saucer, contracted by the U.S. Air Force.

The angel of death appears to weep black tears at this grave marker.

The biggest museum dedicated to insects in North America, one of the largest in the world.

Two adjoining collections of 19th-20th century physics apparatuses and instruments.

This water-locked cliff face is covered in hundreds of ancient pictographs.

Canada's oldest sugar maple has been growing since around 1500.

A neutrino detector built into the largest man-made underground cavity in the world.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

Sleep snuggled in a sphere suspended atop the forest canopy of Vancouver Island.

A haunting collection of the vanished and disappearing natural world.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The oldest stone house in Paris was built by its most famous alchemist.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.