The obelisk-like mountain, Stetind, nearby is dominated by the same, dark blue-grey rock, which contrasts with the clear water in the fjord where the sand banks can be seen just below the surface. Climbers and hikers are often tempted to test their skills on the rocky slopes. The large Frostisen glacier is located in the southeastern part of the municipality. In the east, Ballangen borders on lake Siiddašjávri which it shares with Sweden. Siiddašjávri is the 14th largest lake which lies in or partially in Norway. Other lakes in the municipality include Børsvatnet, Geitvatnet, Hjertvatnet, Kjelvatnet, Langvatnet, Melkevatnet, Røvatnet, Søre Bukkevatnet, and Storvatnet. The island of Barøya sits near the entrances to the Efjorden from the Ofotfjorden. The Barøy Lighthouse sits on the northern edge of the island.