A 2017 crowdfunding campaign saved this historic castle from being destroyed.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

A war-torn Olympic relic is being overtaken by graffiti and nature.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

A wonderfully strange collection of 500+ stuffed frogs doing people things.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Yugoslavia's biggest underground airport lies in ruins.

Relics from an era long gone, sit idle outside this Estonian museum.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

The first designer power line in Estonia.

This statue is dedicated to the animal cosmonauts that perished during space flight experiments.

A black cat protests the City Guild in Riga's Old Town.

3,000 market stands in five former Zeppelin hangars.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

This tremendous timepiece was once the largest cuckoo clock in the world.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

Home to three historic ships from the age of Vikings.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

Located in an old church, this brewery produces a different kind of holy water.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.