Small but beautiful probably best sums up this astonishing swath of green. Declared a UN Biosphere Reserve, this 420-sq.-km (164-sq.-mile) protected forest is all that remains of a once-huge coastal forest that stretched from Somalia all the way to Mozambique; there are more than 230 species of birds, 240 types of butterfly, and 40 mammal species, including elephant. A substantial number of these species are found nowhere else on Earth, including the regularly spotted golden-rumped elephant shrew, the largest of its kind in Africa, growing to the size of a small rabbit and capable of reaching speeds of up to 25kmph (16 mph). You may also be lucky enough to catch sight of one of the world's smallest owls, the Sokoke Scops, which is both endangered and rare.