Cabrits was once its own island. The twin volcanic peaks - East Cabrit at 140 meters and West Cabrit at 171 meters - erupted from the sea roughly a million years ago, part of a formation once called Morne au Diable. Over geological time, sediment and coral built a low-lying connection to the Dominica mainland, transforming the island into a peninsula. That origin explains the park's unusual character: steep volcanic slopes drop to a coastal fringe of coconut palms, sea grapes, and mangroves, while the interior holds both dry scrubland on the rain-shadowed peaks and a 35-hectare wetland that ranks among the largest in the Portsmouth area. Three tree species are endemic here - pond apple, medal mangrove, and white mangrove - and the park shelters 162 bird species, 18 mammal species, 20 species of crabs, and at least 2 species of scorpions.

Fort Shirley's strategic logic is obvious the moment you see it. The peninsula commands the approach to Prince Rupert Bay, one of the best natural harbors in the Leeward Islands, and the site offered clear sightlines in every direction. The British built it into a formidable military outpost - one of the finest examples of its kind in the West Indies. But the fort's most significant moment came not from its cannons. In 1802, enslaved African soldiers of the 8th West India Regiment, garrisoned at Fort Shirley, revolted against their officers. The uprising failed in military terms, but it sent shockwaves through the colonial establishment. Within five years, in 1807, all enslaved soldiers on the island were freed. The fort's walls had witnessed both the machinery of empire and the first cracks in its foundation.

After the British abandoned Fort Shirley in 1854, the tropical forest did what tropical forests do. Roots split stonework. Vines swallowed gun emplacements. Rain dissolved mortar. For over a century, the garrison slowly vanished beneath a canopy of mahogany, teak, and hibiscus - some of it planted deliberately in the 1960s when a small forest plantation was established on the grounds. Then, in 1982, Dominican historian and archaeologist Dr. Lennox Honychurch began the painstaking work of pulling the fort back from the forest. Several buildings have been fully restored; others remain as atmospheric ruins amid the trees. The result is a place where military architecture and tropical ecology exist in layered conversation - a powder magazine roofed in vines, a parade ground reclaimed by ferns, and restored officers' quarters overlooking a bay that still looks exactly as it did when warships anchored there.

Cabrits holds one more distinction: it is the final destination of the Waitukubuli National Trail, Dominica's 115-mile hiking route that runs the full length of the island from Scott's Head in the south. Segment 14 of the trail descends from the village of Capuchin into the park, where hikers can climb to both summits for views across the Caribbean. Since the 2010s, the park has expanded its visitor infrastructure, including a scuba diving center that opened in 2018, giving access to the coral reefs that the marine section of the park protects across 421 hectares of sea. The peninsula that sailors once treated as a goat pen has become something they never imagined: a place where the natural world and human history are preserved together, each making the other more vivid.