Navigation is terrible
Response from developer
There is a full map from the "Locations" tab clickable from the bottom of every screen. The "tiny map" you refer to is just for orientation on the main tour screen while you are at the location—not for navigation. Please use the "Locations" tab to see the full view of the tour on a map. In addition, the audio narration contains additional navigation directions. Finally you can click the "walking man" button over the orientation map to draw a line on the map to walk from your current location to the tour location. Thanks for your feedback.