The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

One of the most controversial statues in Romania is an emperor with no clothes.

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 celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

This once-derelict building is now one of the most beautiful bookstores in the world.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

An underground city of salt.

Where commuters walk through remnants of an ancient Greek necropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

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

An ancient iron pillar in Delhi that seems to be rustproof.

Inside this sculpture park are dozens of woodcrafts crafted by the gentle hands of a chainsaw.

The city of Halifax still bears the scars of the largest explosion prior to the atomic bomb.

This magnificent Crimean estate was once a playground of the Russian elite.

The longest trolleybus route in the world, from Simferopol and Yalta.

The deepest metro station in the world.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

340-foot statue built to honour the Heroes of the Soviet Union.

The largest catacomb system in the world.

A castle perched precariously over the Crimean Sea.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.