The Republic of the Congo is one of Africa's last great frontiers, home to the Congo Basin rainforest, the second-largest tropical forest on the planet. Within the pristine Odzala-Kokoua National Park, ancient jungle and winding waterways shelter western lowland gorillas, elusive forest elephants, forest buffalo and a wealth of rare primates and birds. Trek through emerald forest to track habituated gorilla families, drift along the Lekoli River and explore mineral-rich forest clearings where wildlife gathers in the open. Raw, remote and profoundly wild, the Congo is a true bucket-list adventure for the intrepid traveller seeking Africa at its most untouched. The best time to visit is June to September, during the drier months when the forest trails are most accessible for gorilla tracking.