Running since 2002, and the name to know if you want to reach Kaieteur on foot rather than by air. The five-day overland hike goes Georgetown to Mahdia, by boat to Amatuk and Waratuk, then an eight-hour walk to Tukiet and the climb the guides call "Oh My God" up onto the plateau — sleeping in camps along the way and flying out from the falls. From USD 1,395.
Their Essequibo River day tour is USD 120 for adults, eleven or twelve hours from a 6am start, taking in Fort Island, Bartica, lunch at Sloth Island, Baracara Falls and Fort Kyk-over-al. They also sell arapaima fishing at Rewa and dedicated birding trips.
Licensed by the Guyana Tourism Authority. No WhatsApp — phone or email.