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

Natural cathedral designed by Italian artist Giuliano Mauri.

One of the oldest living oak trees in the Southeast.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

A submerged village appears when dam levels drop.

Where beer lovers can literally immerse themselves in beer.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This massive subterranean fissure is known as the "underground Grand Canyon."

Abandoned medieval hill town.

The largest stone moai on Rapa Nui.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

One of the most unusual geological features, recognizable from a dozen hit movies.

This impressive tunnel was dug entirely by hand over the course of 36 years.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

Paris' linguistic guide to the international language of, yes, love.

The glowing blue Nymphaeum of Emperor Tiberius.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

Walk in the footsteps of the gods and straddle two tectonic plates.