Something's watching you.

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

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

A medieval church built up to defend its village.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

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

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Romania's triumphal arch looks out over Bucharest.

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

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

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 medieval center of the Islamic world was also once the seat of Saladin's sultanate.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

Slum Settlement Filled With Mountains of Garbage.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

A huge museum of much more than just agriculture displayed in a princess's palace.

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

A more chill but no less fascinating version of the famous ancient archeological site.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The largest known Ancient Egyptian obelisk.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

This ancient structure is widely thought to be the oldest intact pyramid in the world.