Bulgaria
Bulgaria occupies a portion of the eastern Balkan peninsula, bordering five countries—Greece and Turkey to the south, Macedonia and Serbia to the west, and Romania to the north. The land borders have a total length of , and the coastline has a length of . Its total area of ranks it as the world's 105th-largest country. Bulgaria's geographic coordinates are 43° N 25° E. The most notable topographical features are the Danubian Plain, the Balkan Mountains, the Thracian Plain, and the Rhodope Mountains. The southern edge of the Danubian Plain slopes upward into the foothills of the Balkans, while the Danube defines the border with Romania. The Thracian Plain is roughly triangular, beginning southeast of Sofia and broadening as it reaches the Black Sea coast.
List of rock formations in Bulgaria
Bulgaria is a country in south-eastern Europe situated in the north-eastern part of the Balkan Peninsula. The country has a great variety of topographical features and diverse landscape ranging from the Alpine snow-capped peaks in Rila, Pirin and the Balkan Mountains to the mild and sunny Black Sea coast; from the typically continental Danubian Plain in the north to the strong Mediterranean climatic influence in the valleys of Macedonia and the lowlands in the southernmost parts of Thrace. The diverse morphological, climatic and hydrological conditions of Bulgaria favour the formation of a large number of geological features.