Brimstone Hill Fortress National Park is a UNESCO World Heritage Site, a well-preserved fortress on a hill on the island of St. Kitts in the Federation of St. Christopher (St. Kitts) and Nevis in the Eastern Caribbean. It was designed by British military engineers, and was built and maintained by African slaves. It is one of the best preserved historical fortifications in the Americas.
The complex of fortifications were constructed on Brimstone Hill, a very steeply sloping hill situated close to the sea on the Western, Caribbean coast of St. Kitts. The word "Brimstone" means sulphur.