Quergang Boulderhalle on Clmb House. Venue in WTL-Areal, Schachenstrasse 82, 8645 Rapperswil-Jona, Switzerland, Switzerland. Quergang is a bouldering hall on the WTL site in Rapperswil-Jona, on Lake Zurich, run by the Quergang association. It offers single entries and subscriptions...