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Varlaam Monastery
Kalabaka, Greece

Meteora

Monasteries on rock pillars, once accessible only by frayed ropes.
39.7142, 21.6311
The Swallow's Nest
Haspra, Crimea

The Swallow's Nest

A castle perched precariously over the Crimean Sea.
44.4305, 34.1282
Canal view of the museum
Saint Petersburg, Russia

Kunstkamera

Peter the Great's enlightening collection of natural oddities.
59.9416, 30.3045
Montenegro

Our Lady of the Rocks

A tiny church on a man-made island in the Adriatic.
42.4867, 18.6889
Niš, Serbia

The Skull Tower of Nis

Structure built from the skulls of vanquished foes.
43.3119, 21.9237
Kuršumlija, Serbia

Devil's Town Rock Formation

The bizarre rocks of Đavolja Varoš are the result of natural erosion.
42.9878, 21.3935
Ogradina, Serbia

Tabula Traiana

A Roman monument to their own civil engineering prowess.
44.6181, 22.6280
Head of Emperor Galerius
Zvezdan, Serbia

Ruins of Felix Romuliana at Gamzigrad

Imperial palace of Emperor Galerius, the Emperor behind the worst Christian persecutions during the Roman Empire.
43.8992, 22.1857
Bor, Romania

Decebal's Head

Giant portrait of an ancient king.
44.6406, 22.2914
(WikiCommons)
Vrnjačka Banja, Serbia

Bridge of Love

Sealing couples' love since just after World War I.
43.6264, 20.8988
Lepenski Vir head sculpture.
Boljetin, Serbia

Lepenski Vir

Stone age urban planning.
44.5477, 22.0283
Višegrad, Bosnia and Herzegovina

Mehmed Pasha Sokolovic Bridge

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.
43.7824, 19.2880
Smederovo, Serbia

Golubac Fortress

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.
44.6615, 21.6788
Pobednik, or "Statue of the Victor," depicts a triumphant royal atop the spire
Belgrade, Serbia

Pobednik (The Victor) Monument

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.
44.8231, 20.4476
Nikola Tesla Museum, Belgrade
Belgrade, Serbia

Belgrade Tesla Museum

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.
44.8052, 20.4707