Brimstone Hill Fortress National Park Brimstone Hill Fortress National Park is one of the top places to visit in Saint Kitts and Nevis. It is a national park in the country and actually, UNESCO recognized it as a World Heritage Site. The park was inscribed in the same name back in 1999 with criteria of iii and iv. The park was founded almost 30 years ago and its main attraction is the Brimstone Hill Fortress. It is one of the most beautifully conserved fortresses in North and South America, including the Caribbean. The place is spectacular. You have to visit it.