These spooky and unusual stone formations create an underworldly landscape.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

A record-breaking pool that uses computers to turn ocean water into cleaner, private swimming water.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

Quite simply the largest tree in the world (by volume).

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

An underground city of salt.

Be(w)ar(e) the moat around this historic Czech castle.

Each year, Germany's "City of Dragons" slays the world's largest walking robot.

The world's most active stratovolcano is almost always erupting.

Sweden's "good old days" painstakingly re-created in a model village.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Singapore's landscaping project is home to 18 incredible Supertrees.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

Whitewashed mosque contains the world's largest carpet.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

A magical oasis in the middle of the Negev Desert.