A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Real bones which are said to have belonged to a Polish dragon.

An underground city of salt.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

Imperial palace of Emperor Galerius, the Emperor behind the worst Christian persecutions during the Roman Empire.

An idyllic traditional timber village on a picturesque hill was built for a film.

A museum dedicated to the former country.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

After 11 years of reconstruction work, Slovakia's finest hilltop chapel complex is finally reopen to the public.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Swedish skyscraper with a 90° twist.

The second-highest train station in Europe.

This work of engineering is imbued with elegance and ingeniousness.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.