Wiki Loves Earth is an annual international photographic competition organized worldwide by Wikimedia chapters, groups and local Wikipedia volunteers. Participants take pictures of local natural heritage and scenic landscape in their countries, and upload them to Wikimedia Commons. For all participating countries there are separate competitions organized by local teams, so periods, rules, prizes etc. might differ a bit.
The basic aim of the competition is to collect photos of natural heritage sites – such as nature reserves, landscape conservation areas, national parks, scenic/landscape areas, remarkable gardens, etc. – to illustrate articles in the worldwide free encyclopedia Wikipedia and other Wikimedia Foundation projects.
The focus is not only on sites of national importance, but also on those protected at the regional level, and on the widest variety of natural sites possible: forests, parks, gardens, rocks, caves, or whatever part of nature is protected in your country.