OSME allows building virtual worlds in a single web app page form.
Try selecting a built-in template to demonstrate sample virtual worlds. (e.g. Form: "Trip Visit Plan - May 2022".)
Project the virtual world onto the map. (e.g. Form: Click the button for the instruction to take effect)
Test one of the virtual objects marked on the map. (e.g. Map: Select a marked location like "Statue of Liberty")
Explore the virtual surrounding in the 360 degrees panorama. (e.g. 3D: Navigate scene in...
The open source augmented reality server, or POI (Point of Interest) search. In its simplest form, it takes a database of points with latitude/longitude, and a search request at a given latitude/longitude, and returns the points sorted by distance.