Inside this German disco, visitors can take a literal ride on the dance floor.

A German town is growing a building out of trees.

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

Spend your honeymoon where the Devil had his wedding.

This former medieval prison now unlocks Estonia’s rich photographic history.

The Guardian of Tallinn.

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

"There's nothing there," and other lies the KGB told us.

An underground nightclub helped spark a "Singing Revolution."

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

Climb to the top of its spiral spire for spectacular views of Copenhagen.