Sloth
The sloth presents a remarkably democratic accessibility profile. Wildlife sanctuaries in Costa Rica, Panama, and Colombia offer reliable sloth encounters for approximately £25-50 per visitor. No specialised equipment is required beyond perhaps a modest pair of binoculars. The sloth descends to ground level weekly for sanitary purposes, bringing itself within reach of even the most sedentary observer. Interaction requires no permits, no training, and poses no significant mortality risk. One simply arrives and waits, a practice the sloth itself would surely appreciate.
Mount Everest
Mount Everest has cultivated an exclusivity that borders on the pathological. A standard expedition demands approximately £35,000-100,000, excluding equipment, training, and supplementary oxygen. The climb requires two months minimum, extensive physical conditioning, and acceptance of a 1-4% mortality rate. Nepal issues roughly 400 climbing permits annually, each costing £9,500. The mountain has killed over 310 people who sought its summit, their bodies occasionally remaining as permanent fixtures of the landscape. Accessibility, by any reasonable metric, approaches negligible.