Romania's only crater lake with water as pure as if distilled.

A muddy alien landscape that is home to rare species of exotic plants.

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

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

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Huge stone depressions which may have acted as an Incan agricultural experiment.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

The Uros people live on floating reed islands in lake Titicaca.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

A small town Romanian cemetery filled with darkly humorous gravestones.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Imperial palace of Emperor Galerius, the Emperor behind the worst Christian persecutions during the Roman Empire.

A giant portrait of an ancient king looms over the river.

A Roman monument to their own civil engineering prowess.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Stone age urban planning.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Religious structure known for its sculpted details.

17th century palace once a meeting place for politicians.

Romania's triumphal arch looks out over Bucharest.