Tri Brata (; literally: "three brothers") are a set of three rocks at the entrance to the Avacha Bay, west of cape Mys Zhukova. The rocks are spread on an east-west alignment. The floor area of each rock measures between , which results in an aggregate area of . The stack, or kekur, is considered a symbol of Petropavlovsk-Kamchatsky.
Local lore suggests that they are three brothers who went to defend the town from a tsunami and turned to stone.