Unlike most itineraries on my site, this post is a one-day activity. If you happen to be near Orlando or you live in Miami, Gainesville, etc. and need a spontaneous day trip with friends — Devil's Den is a must-see hidden treasure. It's right smack in the middle of nowhere (no offense to Williston, FL)— you really need to go there on purpose, you're not likely to pass it on the way going somewhere.
Devil’s Den is also called a karst window, a phenomenon that happens naturally when a roof covering an underground river collapses, exposing the waters underneath to the open. A strange name honestly, but Devil's Den gets its name from the steam that would rise from the den on cool winter mornings. The temperature of the water remains around 72 degrees all year round, making for great steamy displays in the cooler months. Oddly enough I was still cold when I jumped in, but you get used to it and the views from the water are well worth it! The sunnier the better, you'll understand what I mean because photos don't do this place justice. The way the water glistens as its hit by sunlight through the top of the cave is phenomenal.