Hell, Grand Cayman

A gift shop and service station is located in the area, and art depicting Satan can be seen when entering.

[3] "Hell is a unique formation which is characterized by jagged, spongy pinnacles of black-covered limestone.

Filamentous algae bore their way into limestone to produce black-coated, jagged pinnacles marked by delicate, lacy dissection that lacks any gravitational orientation.

First, texture – it is a black, random spongework of pits, jagged ridges and pointed pinnacles.

If you break off a piece, you will see that the black color is present near the surface and it grades to gray inside.

Maybe the splash, spray and mist from the waves breaking provide just enough moisture to sustain the algae.