Add the ability to add collections of point-based spatio-temporal objects to AGOL and work with them on a map with a timeline. (Timeline could be optional.) Ideally collections can be started by uploading a formatted spreadsheet (including long, lat, date, date range, title, description, etc) of information with urls to photos. Collections have many uses. An example of a mapping system that implements Collections well, is Humap https://humap.me/blog-community/documentation/collections/.