Shown below is an island full of pine trees …
In the middle of a pond.

in Everglades Nat’l Park was too deep to walk to
even in the dry season, February 2015
But don’t be confused with the real thing:
Proper pine islands in the swamp are surrounded by a sea of marl prairie and cypress, the depth of which are usually a few inches to a foot.

are ephemeral islands
in the swamp
The pine islands are still dry in Big Cypress National Preserve