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

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

This bone-filled cave got its name after they found 140 bear skeletons inside.

This Romanian village may have been drowned, but it is long from forgotten.

A muddy alien landscape that is home to rare species of exotic plants.

A giant portrait of an ancient king looms over the river.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

A small town Romanian cemetery filled with darkly humorous gravestones.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Moss and stone turn this waterfall into an otherworldly liquid veil.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.

Final resting place for hundreds of prisoners of war.

A huge stone pyramid built for fun.

A self-funded cemetery with a long list of inhabitants.

A granite waterfall cascading down is one of the highest multi-tiered falls in the state.

An abandoned marine theme park has created a difficult experiment in dolphin rewilding.

White cockroaches and other cave species occupy this massive series of lava tubes.

These Australian rock formations look like Martian beehives that have grown up out of the landscape.

This Australian beach is composed of tiny shells.

Rainforest filled with record-holding eucalyptus.

A beautiful, but toxic, lake formed by mining.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

A sparkling sandstone cliffside that's worth a visit while it still exists.