Mammoth Hot Springs, in the north of Yellowstone National Park, comprise extensive terraces of travertine deposited by water as it escapes from underground. I framed one of the terraces with the branches of two hoar frosted trees. The form and colour of travertine is complemented by the ice entombing every twig.
F/10, 1/400th second, ISO 160
Accepted: Wrekin 2012, Between the Sky and Earth (Slovenia) 2012, Welsh 2012