OpenStreetMap has a really cool 3D demo. A Prior picture was of the Eiffel tower in Paris, but I prefer to look at places I've stayed to see if they are supported.
Annie here! My favorite site to show new Wikimedia contributors is https://wikishootme.toolforge.org which shows nearby landmarks that need photos. Gonna snap a pic of this park in Brooklyn next time I'm nearby! Created by the incredible @magnusmanske (whose many, many Wikimedia achievements include creating the first article on German Wikipedia)