Bulgaria

Underground domed chamber with stone steps

Multilayered settlement mound in Bulgaria

Ancient Thracian city with fortress ruins

Ancient Thracian city with significant tumuli.

Ancient Thracian and Greek settlement site

Ancient Thracian sanctuary and tomb site

Thracian beehive tomb with Hellenistic murals

Ancient Dacian town in Moesia region

1st-century Roman villa with mosaics

Dacian town in northern Bulgaria.

Early Christian basilica with Roman mosaics

Prehistoric fortified salt production town

Unique Thracian tomb with polychrome decor.

Ruins of medieval Bulgarian capital site.

Fortified palace complex with Gothic ruins.

Early medieval rock relief of horseman

Elaborate Thracian tomb with rich artifacts

Thracian tomb with domed chamber and antechamber

Prehistoric cave with ancient paintings

First Bulgarian Empire's medieval capital

Chalcolithic cemetery with world's oldest gold.

Well-preserved 4th-century Roman burial tomb

Ancient city with diverse historical structures

Ancient city on seven syenite hills

Ancient Thracian city with Greek influence

Neolithic to Medieval Thracian settlement.

Ancient coastal city with Greek origins

Ancient Thracian city with Roman and Byzantine ruins

Thracian tomb with griffin motifs and dome.

Thracian tomb with unique architectural features.

Thracian tomb with frescoes and artifacts

Well-preserved Neolithic houses in Bulgaria.