Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

A museum filled with tiny, adorable versions of the mighty Royal Danish Navy.

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

An unfinished rail tunnel that has since been used to house cheese and bats.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Cave on extinct volcano, once home to famous mathematician Pythagoras.

Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.

A forlorn fishing village on the coast of Labrador, full of shipwrecks and Spanish gold.

This rocky spread has been squeezed up directly from the bowels of the earth.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Hidden in a Scotland museum is a copse of extinct tree stumps.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

Miraculous tree that seems to sprout out of solid rock.

Cross mysteriously appeared for 36 years.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Each year melting snow turns these Austrian hiking trails into scuba zones.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

A small town market proudly displays numerous taxidermied animals along its walls.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A library of rare occult books in Los Angeles.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

One of the world's largest Tesla coils.