If you've noticed a 130-foot-tall tower at the Prineville Water Treatment Facility in Port St. Lucie, you're not alone. See what it is for.

Tucked away beneath an old water tower, we found the entrance to a cave that goes down an unbelievable 550 feet. In this video, we take you through the full descent - narrow passages, free-fall drops, ...

Phase 1 of the Water Tower District, which includes 259 residential units and retail space, is under construction. More new housing is being planned for a major mixed-use development in Collierville.