Jeff Elder is Digital Communications Manager, Wikimedia Foundation.

The tangy butterscotch glow of a limestone cave in Serbia soaking up the slanting sun. The emerald green of lush German forest and pond covered with lush weeds and trees. The stark white and blue of a Ukraine snowscape 2,028 meters above sea level, where snowy peaks meet cloud and sky.

The colors of nature burst from the 15 finalists of Wiki Loves Earth, the photo contest now in its third year of crowdsourcing gorgeous landscapes from more than 13,600 participants. The top 15 photos this year come from Serbia, Bulgaria, Nepal, Estonia, Ukraine, Spain, Austria, Brazil, Germany, and Thailand.

National judging in 26 regions sorted through 115,000 photos and sent the best to international judges from Ghana, Germany, South Africa, Kosovo, France, India, Estonia, Indonesia, and Bulgaria.

This year, the contest expanded to include a collaboration with the United Nations Educational, Scientific and Cultural Organization, better known by its acronym UNESCO. Contestants were invited to upload photos in a separate category for UNESCO biosphere reserves in 120 different countries.

You can see more about Wiki Loves Earth on its website, and this year's jury report on Commons.