Complex sentence: The Gumbo-limbo is often referred to as the Tourist Tree because the tree's bark is red and peeling, like the skin of sunburnt tourists, who are a common sight in the plant's range.
Split into simpler sentences: The Gumbo-limbo is often referred to as the Tourist Tree. The reason for this is the fact that the tree's bark is red and peeling, like the skin of sunburnt tourists which are a common sight in the plant's range.