Japan established its first public park in 1873 (Ueno Park). This number has grown to 31 national parks which cover 21,000 sq.km. (5.5% of the land area). They are scattered across the country from the northern tip of Hokkaido to the southernmost islands of Okinawa. Japan's national parks cover a wide range of environments including volcanoes, forests, marshes, beaches, coastlines and underwater marine habitats. Visitors to the parks can enjoy a variety of outdoor activities such as hiking, boating, fishing, snorkeling, diving and hot springs. Some parks have also established eco-tourism activities such as whale and dolphin watching and guided nature hikes.