Rock-hewn Churches of Ivanovo
The Rock-hewn Churches of Ivanovo is a complex of small medieval rock churches, chapels and cells, carved at different heights in the cliffs of the picturesque canyon of the river Rusenski Lom. These caves were dug as hermitages during a period running from the 10th century to the 15th century, turning the river valley and its tributaries into a Bulgarian spiritual centre. The Rock-hewn Churches of Ivanovo, with their extremely well-preserved murals, are a UNESCO World Heritage Site.