3D Models made with QGIS, plugin Qgis2threejs (https://plugins.qgis.org/plugins/Qgis2threejs/), NASA SRTM, Images from various sources (credits printed and/or quoted in metadata of each model), some OSM data. And uMap of course.
Some models may take a while to download (6 to 12MB).

http://umap.openstreetmap.co/m/1095/