This giant wooden treehouse within a sprawling garden has its own eatery.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

This elderly couple's hand-picked collection of rare gems is one of the finest in all of Iceland.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This replica Viking village was created for a film that was never shot and is now open to visitors.

The Icelandic Sea Monster Museum explores the area's history of aquatic cryptid sightings.

An encyclopedic collection of mammal penises.

Staves, storm-calling, and of course, necropants.

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

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

This disused church, left to the elements of the Arctic Circle's forests is open for exploration.

A small island dotted with old, historic Finnish buildings.

A replica of the home of a famous fictional troll family.

Villas that once served as playgrounds for the rich now fall away in decay.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

One man's personal kunstkammer, museum and shop.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

A lovingly curated curio shop in which the taxidermy wear newspaper party hats, and peanut shells are spread across every surface.

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

A peculiar family mausoleum built by a German nobleman captivated by the occult.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

The site of the first battle of World War II.