"Traverso" train RABe 526 1../2.. of the Südostbahn is crossing the Sitter viaduct between St.Gallen Haggen and Gübsensee, highest railway bridge in Switzerland (99 meter), running as train VAE 2130 VORALPEN EXPRESS from St.Gallen via Wattwil-Rapperswil-Arth Goldau to Lucerne. In the valley are the buildings of the 13,4 MW Kubel hydro power station from 1900, using the water of the Urnäsch and the Sitter rivers via the Gübsensee.