Flens-Arena, Sports arena in Flensburg, Germany

The Flens-Arena is a multipurpose hall on the Sandberg campus of Flensburg's university and university of applied sciences, about two kilometres from the city centre. Its capacity is 6,300 spectators, and at opening it had the largest standing terrace in the Handball-Bundesliga with over 1,500 places. The complex also houses a fitness studio and rooms used to train sports teaching students.

Built in 2001 as the Campushalle, the hall has served the university sports programme since then. SG Flensburg-Handewitt have played their home matches there since 2 December 2001. The Flensburger Brauerei became main sponsor on 14 November 2012, when the hall was renamed Flens-Arena. In April 2023 the club bought back the naming rights and it was called Campushalle again; from September 2024 to July 2026 it was the GP JOULE Arena, and it now bears the name GGW Arena.

The venue is primarily known as the home court of the SG Flensburg-Handewitt handball team and regularly draws fans to exciting matches. Beyond sports, it hosts concerts, exhibitions, and university celebrations that make the building a versatile gathering place.

The arena sits on the university campus about two kilometres from Flensburg's old town, so allow time to walk or take public transport. The entrance forecourt is named Lars-Christiansen-Platz after the former SG Flensburg-Handewitt player, marked by a yellow sign. The building also houses a fitness studio and rooms used by sports teaching students, so parts of the complex stay busy outside match days.

The building sits on the Flensburg University campus and also houses a fitness center and specialized rooms for sports students. This integration with the university sets it apart from isolated stadiums and makes it part of the local academic life.