Tsingy de Bemaraha is a national park in Madagascar. The Tsingys are karstic plateaus in which groundwater has undercut the elevated uplands, and has gouged caverns and fissures into the limestone.
Tsingy de Bemaraha

Tsingy de Bemaraha is a national park in Madagascar. The Tsingys are karstic plateaus in which groundwater has undercut the elevated uplands, and has gouged caverns and fissures into the limestone.