"Holy Wisdom" overlooks the city that became its namesake.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

UNESCO-protected ancient burial ground.

A striking symbol of the Bulgarian capital.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

This historic black and white monastery is one of Bulgaria's architectural jewels.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Featured in one of the most iconic scenes in cinema history.

The deepest metro station in the world.

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

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

This fortress-like monastery is covered with intricate frescoes.

Romania's triumphal arch looks out over Bucharest.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

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

Something's watching you.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

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

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

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

A countryside Romanian cemetery filled with colorful crosses bearing lyrical, ironic, or satirical rhymes.