A series of concentric circles represented a bold new experiment in socialist urban planning, and it notoriously difficult to get around.

Troublesome students were detained in this tiny graffiti-covered university jail.

The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

A forest park outside Tallinn full of architectural and artistic curiosities.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

Thousands of birds nest in the cliffs while arctic foxes prowl below.

Once the scene of a young boy's home in revolt, this Norwegian island is now home to the world's first "ecological" prison.

Ruins of two abandoned stations destroyed by the power they sought to harness.

The people murdered during a 17th-century Norwegian witch hunt have been honored with a pair of stark, modern installations.

Art becomes an enchanting part of the environment at this wooded sculpture park.

Research station devoted to mysterious floating lights seen in a Norwegian valley.

Mysterious man-made rock piles form an ancient cemetery on this rocky beach in Norway.

St George's Leprosy Museum depicts the gruesome afflictions of those suffering from the disease.

A small collection of magic tricks and memorabilia is now an apartment-sized museum.

Norway's oldest cathedral still in use.

Tens of thousands of tiny bottles stuffed with various items.

Thousands of years of crashing waves gave this mushroom-shaped rock its svelte figure.

The world's northernmost aquarium looks like it has fallen over.

World's strongest whirlpool.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.