Avren Rocks are three adjacent rocks situated in the interior of Micalvi Cove in the south extremity of Robert Island, South Shetland Islands. The group extends 260 m (280 yd) in north–south direction and is 150 m (160 yd) wide. The rocks were first mapped in 2008 by a Bulgarian team. They are named after two settlements in Varna and Kardzhali provinces situated in northeastern and southeastern Bulgaria respectively.