The price may seem staggering, but let’s break it down: the Journey to Nature’s Edge by Natural World Safaris lasts 111 days in total, covers 12 countries, offers a chance to see 18 of the world’s most vulnerable species and $100,000 per booking is donated to a conservation fund. Spot white rhinos by helicopter in Kenya, search for tigers in India, see polar bears in the Arctic and track down giant tortoises in the Galapagos Islands.