A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

The world's largest underground iron ore mine.

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

The prototype for all Nazi concentration camps.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

This museum promotes informed contraception by documenting its often secret past.

The topiary maze at the Habsburg hunting lodge.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

These trenches were used to train the Scottish military for life on the frontlines of World War I.

On high feast days, the entire blue-glass front of this modern church opens up to reveal the small wooden church inside.

An abandoned train station in Munich constructed for the 1972 Olympic games.

A subterranean display of public art and architecture.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

Warsaw's fantastically preserved gasworks...almost.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

This wooden recreation of a 9th century lake village looks as though it was built yesterday (which it relatively was).

Devilish masks, handicrafts, and pieces of old buildings create a snapshot of life in a historic Alpine region.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

Okinawan dining in a twenty foot tall, man-made tree house overlooking Naha Harbor.