One of the highlights of our first trip to Nigeria together in 2000 was a day trip to the Okomu National Park, not far from Benin City. Once inside the tropical rainforest, the almost continuous canopy creates a shaded light, while the sound of tropical fauna echoes through the huge sinewy trees. With over 200 species of birds, 700 species of butterflies and rare monkeys and chimps (as well as the odd crocodile and elephant), its a nature-lovers treasure trove. The best bit was climbing an enormous 40m+ cotton silk tree with a trunk the width of two or three cars, via a ladder leading up into infinity. Its good to see that the place has been developed recently with eco-tourism in mind - the website linked to above is not at all bad. If you're thinking of visiting Nigeria and want a relaxing tropical rainforest experience away from it all, this might be a good option.