Christmas Tree Point Road and the hills of Twin Peaks, San Francisco, USA

© Terence Chang/Getty Images

Christmas Tree Point Road and the hills of Twin Peaks, San Francisco, USA

Panoramic views await at the dual peaks of Noe and Eureka, which rise nearly 1,000 feet above San Francisco. Known as Twin Peaks, this landmark provides habitat for a special species – the Mission blue butterfly. Only a handful of places in the world support these endangered little blues and all are here in the San Francisco Bay Area of the United States. Most of their grassland habitat has been destroyed.