Largest Kauri tree in New Zealand.

Highly spherical boulders on the shores of New Zealand.

This unusual rock formation looks like an apple that has been neatly sliced in half.

The most southerly spot on New Zealand's South Island is home to surreally shaped, permanently mangled trees.

A glacier pocked with ice caves and surrounded by rainforests.

Known for the tunnel that leads visitors to the water.

Tubing through a cave lit with glowworms is a magical underground experience.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Legend holds eating just one of these black eggs can add seven years to one's life.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Take a walk in a recreation of ancient Rome.

This small condiment museum makes all manner of mustards with a 200-year-old mill.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.