A proper hiding area is an often-underestimated feature of a natural terrarium. Without a safe spot to hide and sleep reptiles and amphibians will easily develop stress that will effect their activity and appetite. Hide-outs often also provide a shelter or a cooler area in the terrarium.
Key Features :

Natural look, integrates in any type of terrarium
Easy to clean
Provides a secure hiding place
Prevents stress
Very stable, not easily tipped over by larger reptiles,