Wiesbaden's sewer system was built between 1900 and 1907.
The walkable sewers were already considered a tourist attraction in Imperial Germany. The Wiesbaden Sewer Construction Office invited the public to guided tours and sold tickets for ten cents to take a short tour of the subterranean world of Wilhelmstraße from Warmer Damm to Mühltal.
The sewer where the Salzbach stream flows is made of artistically laid basket-handle arches seven metres under Wilhelmstraße and Friedrich-Ebert-Allee, is a special feature of the sewer system. The canal containing the Salzbach, which itself is 4.5 metres deep and five metres wide, is bordered by walkways. The sewer has the capacity to drain some 85,000 litres of water per second.