Blowing Rocks Preserve, on Jupiter Island just south of town, protects one of the most unusual stretches of shoreline in Florida. An outcrop of Anastasia limestone runs along the beach, honeycombed by centuries of wave action into tunnels, arches, and blowholes. At high tide, especially during winter storms, waves force water through the openings and send plumes of spray shooting above the rock — spectacular enough that people time visits around the tide tables.
Owned by The Nature Conservancy, the 73-acre preserve also has a lagoon on its western side and a stretch of natural beach where sea turtles nest in summer. The nature centre near the entrance covers the ecology of the site, including the loggerhead, leatherback, and green turtles that use the beach. It is a 15-minute drive south of Jupiter on County Road 707.