Tower Karst
Tower karst is formed through the differential chemical weathering of limestone along vertical joints in areas of long-term tectonic uplift. Tower karst is especially common in tropical (warm & wet) environments.
Over time, tectonic uplift raises a limestone platform, increasing the platform's distance from base-level, which allows overland water flow to cut steaper channels in the structure. Weathering/erosion happens faster along vertical joints in the limestone structure, which creates steep walls. Tropical environments allow this process to occur faster than more arid regions.
What is left is a series of steep-walled limestone protrusions that will themselves one day be dissolved away by the same rainwater that left them standing where they are.