Nanga Sumpa Lodge is a rustic eco-lodge nestled on the banks of the Delok River in the remote Ulu Ai region of Sarawak, Malaysian Borneo. Established in 1987, Nanga Sumpa Lodge offers travelers an authentic cultural immersion and access to pristine rainforest landscapes.​ Accessible via a scenic longboat journey from Batang Ai Lake, the lodge serves as a base for nature-based activities and excursions, allowing visitors to learn about the culture and lifestyle of the Iban community living in the nearby longhouse. ​The lodge features two accommodation wings: the Forest Wing, offering rooms with en-suite bathrooms, and the Ruai Wing, providing rooms with shared facilities. Electricity is supplied by a generator from 6:30 PM to 10:30 PM, with solar-powered nightlights illuminating public areas. ​Nanga Sumpa Lodge is ideal for travelers seeking an off-the-grid experience that combines cultural authenticity with rainforest adventure. While facilities are basic, the lodge's commitment to sustainability and community-based tourism makes it a meaningful and enriching destination.