Schlaich Tower, Observation tower and footbridge in Weil am Rhein, Germany

The Schlaichturm is a 24-metre stair and observation tower at the northern edge of the Dreiländergarten in Weil am Rhein, completed in 1999. A 45-metre footbridge 16 metres above the B 317 road leads from the Weil-Gartenstadt station platform to a circular platform 10 metres across; two stairways rise to a viewing platform at 20 metres. A central steel mast carries twelve radial stay cables, and two spiral staircases about 65 metres long lead down to the park.

The tower was built for the Grün 99 regional garden show and completed in 1999, named after the engineering firm Schlaich Bergermann und Partner, which designed and calculated it. It replaced a ramp that would have needed 370 metres to climb the 22-metre difference at a 6% gradient. The same firm later designed Stuttgart's Killesberg tower.

The tower's name honours the Stuttgart engineering office Schlaich Bergermann und Partner, which designed and calculated it. Its cable-stayed structure resembles the Killesberg observation tower the same office built two years later. The two spiral staircases, each about 65 metres long, are separated for ascent and descent.

The crossing is accessible on foot with stairs leading up at a steady pace to reach the viewing platforms. Multiple levels allow visitors to pause and take in views at different heights.

The tower's two spiral staircases are each about 65 metres long and 1.20 metres wide, one reserved for climbing and the other for descending. Vertical and diagonal cables brace the spirals, and spotlights at the top and bottom of the mast bounce off fan-shaped mirrors to light the tower indirectly at night.