Rhumsiki, also spelt Rumsiki and Roumsiki, is a village in the Far North Province of Cameroon. Rhumsiki is located in the Mandara Mountains 55 km (34 mi) from Mokolo and 3 km (2 mi) from the border with Nigeria. The village is similar to many others in northern Cameroon. The inhabitants, members of the Kapsiki ethnic group, live in small houses built from local stone and topped with thatched roofs; these homes are scattered throughout the village and surrounding valley. Nevertheless, Rhumsiki is one of Cameroon's most popular tourist attractions and "the most touristic place in northern Cameroon".

The attraction is the surrounding scenery. Gwanfogbe, et al., describe it as "remarkable",Lonely Planet as "striking",Rough Guides as "breathtaking" and Bradt Guides as an "almost lunar landscape". Writer and explorer André Gide wrote that Rhumsiki's surroundings are "one of the most beautiful landscapes in the world." The spectacular effect is created by surrounding volcanic plugs (the remnants of long-dormant volcanoes), basalt outcroppings, and the Mandara Mountains. The largest (and most photographed) of these rocks is Kapsiki Peak, a plug standing 1,224 m (4,016 ft) tall.