The Malin image I wanted of Karst?
Its like swiss cheese. Hard to tell whats up and down. I got dizzy trying, must have beer to straighten up. The holes may be craters, but there sure are a lot of them. I thought sinkholes, but the whole thing does look much like a hot spring terrace, later eroded. Click the image for the enlargement, its worth it.
This next image is a bit similar. On the left middle is a curious moated "island." The whole place looks like it got dissolved in acid. The lighter colored surfaces look like cumulus cloud tops. What an incredible place