Brimketill lava rock pool is a natural swimming pool located in the Reykjanes peninsula in Iceland. It is a unique geological formation created by a lava flow from a nearby volcano. The pool is filled with crystal clear seawater and surrounded by black lava rocks. It is a popular spot for swimming, snorkeling, and sunbathing. The pool is located near the Blue Lagoon and is a great spot to relax and take in the stunning views of the surrounding landscape.