When I was up Montpelier Canyon yesterday morning ( see my other post
here)
I caught this on the opposite side of the canyon where the early sun was causing some melting. This was way up the side of the canyon so I needed my Sigma 600mm F/8.0 catadioptric lens to catch the action. Looks like the inside of a cave with stalactites made of ice and some unknown organic slime.
To get a sense of scale here's a wide shot with the 50mm FA , 4 times closer to the action and later in the day ...