Inaugurated three times, this tower offers some of the best views of Madrid.

Built in 1925, this glass-roofed shopping arcade is known for its modernist Italian architecture.

The former home of a conniving 17th century politician is now a high-end hotel.

The history of this Moorish castle includes royals, a Mexican-Spanish association, and several attempts at lodging.

This haunting location was featured in the final scene of a classic spaghetti western.

The oldest residential street in Europe also features an optical illusion.

The longest timber-piled jetty in the world has an underwater observatory.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

Visit an imposing 13th-century Transylvanian citadel lurking not far from the region's more heavily touristed attractions.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

The final resting place of the famed German pilot, the "Red Baron."

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

A ruined castle stands atop a hill surrounded by dragon lore.

The monumental home of Prussia’s eccentric "Cannon King."

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

An officers prison camp believed to be impregnable by the Germans saw over 30 successful escapes.

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

There are two dozen tanks just sitting in an open field in Lower Saxony.

The largest brick bridge in the world.

An ornate century-old elevator still connects the two halves of Bad Schandau.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.