Consider the Wikipedia article for . The lead section notes: "It is renowned for its annual migration of 1.5 million wildebeest and 250,000 zebras." That is a wild attraction. Similarly, the Amazon Rainforest article highlights biodiversity as a "magnetic draw" for scientists and adventurers.
: Wikipedia distinguishes between "nature tourism" (general outdoor activities), "ecotourism" (sustainable and educational travel), and "adventure tourism" (high-risk activities involving physical exertion).