43°2′36″N 23°21′10″E / 43.04333°N 23.35278°E / 43.04333; 23.35278

The Iskăr Gorge is a 70 km (43 mi) gorge passing through the Balkan Mountains (Stara Planina) in Bulgaria. It is the chief pass through the Balkans, which otherwise cross northern Bulgaria in a solid line.^[1] The pass connects the capital of Sofia with other major cities in the country, such as Mezdra. There is a road and a railway through the pass, following the course of the Iskar River.^[1]

The canyon walls are made of limestone and sandstone, which was carved down by the Iskar over thousands of years, resulting in rugged crags and towers throughout.^[1] At one point, the walls are nearly 300 metres (980 ft) tall.

1. ^ ^{a b c} Scheffel, Richard L.; Wernet, Susan J., eds. (1980). Natural Wonders of the World. United States of America: Reader's Digest Association, Inc. p. 189. ISBN 0-89577-087-3.

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