Devil's Millhopper Geological State Park

Almost all of Florida sits on a thick bed of limestone, a soft rock made from the shells and skeletons of ancient sea creatures, laid down when this land lay beneath a shallow ocean. Slightly acidic rainwater and groundwater slowly dissolve that limestone over ages, carving out caves and hollows underground in a landscape geologists call karst. When the roof of such a hollow gives way, the surface collapses into a sinkhole.

Devil's Millhopper is a large, deep sinkhole of this kind, its funnel-shaped bowl dropping many stories into the ground. Small streams of water seep from the exposed walls and trickle down as delicate waterfalls, feeding the wet green world at the bottom before draining away into the aquifer below. It is a living example of the same process that riddles Florida with springs, caves, and sudden sinkholes across the state.

The walls of the sinkhole slice through millions of years of Florida's past. Exposed layers reveal the marine limestone at the base, laid down when Florida was seafloor, topped by younger sands and clays. Embedded in these layers are fossils, marine shells, shark teeth, and the bones of Ice Age animals that fell or washed into the pit long ago.

It was those bones that gave rise to the devilish name, as early visitors puzzled over why so many animal remains gathered at the bottom of the deep hole. To geologists, the sinkhole is a natural cross-section, a rare chance to read Florida's buried history in the open, and the park's interpretive signs explain the story the exposed walls tell.

The most magical part of a visit is the descent. As the boardwalk stairs carry you down into the bowl, the air noticeably cools and moistens, and the vegetation changes from dry upland pine and oak at the rim to a lush, shaded world of ferns, mosses, and broad-leaved plants below. The constant seepage of water and the shelter of the deep walls create a cool, humid microclimate that feels like a pocket rainforest sunk into the Florida flatlands.

Some plants that grow at the bottom are more typical of cooler, wetter regions to the north, surviving here in the sheltered chill of the sinkhole. Standing at the base among the trickling streams and dripping ferns, with the rim of ordinary forest far overhead, is a genuinely otherworldly experience, and the reason this small park has drawn curious visitors for well over a century.

Fall, winter, and spring are the most comfortable seasons for the walk down and back, with mild dry air and cooler temperatures that make the stairway climb easier. Spring also brings fresh green growth to the ferns and trees within the bowl.

Summer is hot and humid with heavy afternoon rains, and while the bottom of the sinkhole stays cool and damp, the climb back up in the heat can be demanding, so early morning is best. Heavy storms sometimes damage the boardwalk or close the stairway, so it is always wise to check the park's status before making the trip in the wet season.

The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.