Legend has it that not even Stalin could pull down the 2015 European Tree of the Year.

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

In this tiny Iranian town playing on the roof isn't just encouraged, it's the only place to go.

Only a handful of these gorgeous historic waterwheels remain but even those are in danger from local unrest.

A small museum in this border city displays the contraband art that has been stolen back from smugglers.

The largest coin pyramid in the world is a carefully balanced stack of over 1,000,000 pieces.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

Climb right into the heart of this colorful Iceland volcano.

The history of sea-faring refuse and disaster is on cramped display in this Netherlands folk museum.