Panoramio photo sharing website includes capabilities to put an X mark on Google Maps / Google Earth where you were standing when you took the photo. The site several years ago used to have URL links to member's personal KML files. KML stands for Keyhole Markup Language. The Panoramio site still has such capabilities, though the link to the personal KML seems to have vanished from the current Panoramio interface.

The URL syntax for locating the KML of a particular member is as follows: