The Caribbean islands, spread between North and South America, are a hot spot of weather, plant biodiversity and culture. The islands range from tropical rainforest to frigid mountain peaks, some densely packed with remote mogos: isolated steep-sided mounds on otherwise flat plains. The high humidity and rainfall contribute to a lush flora and fauna. There are over 11,000 plant species discovered, 189 species of amphibians and 564 species of birds. The herbal traditions of the Caribbean are rooted in this abundance of biodiversity.