A collection of intricate sculptures so small they have to be seen through a microscope.

This bed and breakfast is steeped in history and offers guests a unique way to experience nature—glass igloos on a frozen lake.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.

This fantastical icy castle is built anew every winter.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

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

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

A wunderkammer of mysterious objects and stories.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This artificial cave looks like something out of a fairytale.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

On an island south of Iceland, a large volcanic rock formation resembles an elephant.

Climbing Iceland's highest peak on the rim of the Oræfajökull volcano.

This canyon is comprised of gorgeous waters and magnificent basalt columns.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

This mountain fissure hides a secret path to a secluded mossy grotto within the rock itself.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

Three columns of volcanic rock shoot out of the ocean.