[cogitator]

ping!

[Robert A Cook PE]

Neat.

[JimSEA]

Ain't Limestone and the shapes erosion takes it too neat? In addition to the national park, notice all the small islands just to the south between Phuket and Krapi. They are limestone pillars sticking out from the sea and riddled with caves. In several the center of the Island has collapsed forming a lagoon surrounded by limestone cliffs and accessible only through sea level caves.