An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

One of the newest mosques in a city filled with thousands.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

You'll find rocket launchers, not rollercoasters, at Russia's “military Disneyland.”

A solemn, monumental, kitschy palace of worship honoring victory in the Great Patriotic War.

A Russian museum dedicated to the household staple, the samovar.

Model Trains and Much More in Hamburg.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The reconstruction of this prominent building fulfilled a long-written command.

The oldest housing complex in Riga is a mini timeline of architectural trends.

A small part of Russia that does not touch any other part of Russia.

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

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

An extensive collection of some of the oldest grave markers in Lithuania.

The reason for the strange contortions in the trunks of these "drunken" pine trees in Russia is still a mystery.

Monastery, army base, and infamous Soviet Gulag in the far Russian north.

No one knows why ancient labyrinths were built on this tiny northern island.

A monument to the defenders of the Arctic in Murmansk, Russia.

This Arctic storage facility is a secure backup for agricultural biodiversity.

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

This Arctic mining town is home to a cat that's spent years masquerading as a fox.