ZSL London Zoo - A Great Day Out! Enjoy the beautiful Regent's Park surroundings and heritage listed buildings at the world’s oldest scientific zoo. Immerse yourself in Tiger Territory and come face-to-face with two beautiful tigers through floor-to-ceiling glass windows. Kids will love the Animal Adventure – an immersive animal experience, designed for kids, by kids. View animals in a different light at Rainforest Life (London’s only living rainforest), and go on a journey high into the treetops to meet a variety of amazing rainforest species. Or head down to the beach and watch a colony of penguins dive, swim, frolic and feed. ZSL London Zoo boasts over 800 species of animal. From the biggest of the big cats, to the tiniest invertebrates it’s not just a fantastic visitor attraction but also a world leading conservation project. And when you beat the queues with a ZSL London Zoo Fast Track Ticket, the price includes a donation to ZSL’s conservation program.