South Tower (Swedish: "Söder Torn") is a high-rise building located on Fatburstrappan 18, next to Fatbursparken on Södermalm in Stockholm.

[3] The Tower's site was previously a lake called Fatburen, which had formed due to isostatic uplift after the last glaciation.

[4] The rail yard was closed in 1980 and the neighborhood re-developed into a residential district during the period 1985-1995 which features a large number of buildings in the post-modern style.

[2] The top floor of the building is a glass-enclosed party room and terrace with panoramic views of Stockholm.

[2][8] A fountain sculpture at the Tower's base, La Fontaine aux quatre Nanas by French-American artist Niki de Saint Phalle, attracts many viewers due to its styling and location adjacent to a heavily used path between Stockholm Södra station and the plaza Medborgarplatsen.