Brimstone Hill Fortress National Park is a UNESCO World Heritage Site of historical, cultural and architectural significance: a monument to the ingenuity of the British military engineers who designed it and to the skill, strength and endurance of the African slaves who built and maintained it. One of the best preserved historical fortifications in the Americas, it is located on the island of St. Kitts in the Federation of St. Christopher (St. Kitts) and Nevis in the Eastern Caribbean.