This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

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

The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

This open air archeological site houses almost as much wildlife as it does classical religious artifacts.

Monasteries on rock pillars, once accessible only by frayed ropes.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

This legendary city has been a tourist attraction for centuries.

Large collection from the 3rd millennium BCE.

Where commuters walk through remnants of an ancient Greek necropolis.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

What once sat in the world’s spotlight is today a largely disused ghost complex.

The hallucinogenic center of the ancient world.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

Retirement home for giant obsolete machines.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

Terrifying derelict military hospital once housed a recuperating Hitler.

The "Prussian Versailles" that is as glorious today as when it was built.

A 12th-century fortress containing some of Berlin's oldest buildings.

Started as a kitchen garden, now the second largest botanical garden in the world.