The Bramfelder See is located in the Hamburg district of Steilshoop. It has an elongated shape and is fed by several springs, including the former Prökelmoor. It is about 1.2 km long from east to west. It is much narrower, about 400 meters in the east, and just under 100 meters from the north to the south bank at its narrowest point. Nowhere is the lake deeper than three meters. A path leads around it that is almost three kilometers long. Two of the four islands are only separated from the bank by narrow water channels. The largest island is in the eastern part in the middle of the lake and is about 600 m² in size. For several years now, there has been a large colony of grey herons on this island. In 2005, over 30 pairs of herons bred there. While the lake was previously used commercially by carp farms, it is now a model biotope whose water surface is maintained by a fishing club. The banks are overgrown, and several environmental projects have been set up here. A 2.9 km long circular path around the lake has made the lake an important local recreation area, not only for the nearby new development area of Steilshoop. On its west side there is a large playground and barbecue area. The main cemetery in Ohlsdorf is directly adjacent to the northern shore of the lake. In the south, the lake water flows via the Seebek, first into the Osterbek and finally into the Alster. The islands are protected and can be easily observed from the hiking trail. Not far (approx. 800 m away) from the Bramfelder See is the Alte Teich, which is also known as the "small" Bramfelder See.