This would be a portfolio site for my partner, who was at the time studying for an Ecology degree. Aside from his studies, he is an avid user of the app iNaturalist, which allows him to track species of animals & insects he encounters. This is all fed into a community-driven app which - fortunately for me - exposed a public API.
This allowed me to create a map and listing page, which would list all the entries he had recorded and plot them on a Google Maps implementation.