2025-08-08 00:00:00 —Disclaimer: this app is in beta stage and currently only available for the inner city of Vienna— CityRiddler helps you explore the city with the eyes of a local. You tell the app what you like (don’t worry – we won’t judge), how much time you have and where you want to start and end. Our CityRiddler Engine will work its magic to create a unique and unforgettable experience for you and your friends! *What kind of experience do I get?*