Once known as the Eichelberger Sink, this 90-acre preserve located near Eustis is managed by Lake County Water Authority. Hidden Waters Preserve was established in 1996 to protect the water seepage and Lake Alfred where water slowly seeps into the aquifer.
Hidden Waters Preserve offers 6 trails ranging from 2 miles to 15 miles. Hike the meandering paths through sandhill restoration areas. Notice the newly planted Long-leaf pines and the gopher tortoises who make their burrows there. Water flowing from a seepage slope offers the opportunity to discover various plants and ferns.
The elevational difference between the top of the sink and the bottom is 110 feet. Explore the depression marsh and lake at the bottom of the sink where you will find a variety of plants and wading birds. Bird watchers will be happy to discover some of the more than 35 birds on this designated FWC Statewide Birding Trail.
For more information and trail maps click here: 
https://www.lcwa.org/land_resources/open_preserves.php
Photo Credit: Dan Kon