Stadthaus Zürich

At Stadthaus Zürich, visitors can head to the security desk to fill out a registration form and collect special keys. These keys grant self-guided access to hidden archaeological sites and historic subterranean ruins across the city.

Viewers express enthusiasm and curiosity about the key retrieval process, with many locals surprised to learn about this hidden offering. However, commenters frequently ask about costs, maps, and stroller accessibility, while warning that keys run out quickly due to high demand.