As a starting point to research I thought mountains could be a good start in terms of visuals. There's a range of information to be gathered concerning mountains e.g height, width, country. Maybe looking at the top 10 most dangerous mountains in the world:
/ANNAPURNA, Central Nepal (26,545 ft.)
/NANGA PARBAT, Kashmir (26,657 ft.)
/SIULA GRANDE, Peruvian Andes (20,814 ft.)
/K2, border of Pakistan and China (28,251 ft.)
/KANGCHENJUNGA, border between India and Nepal (28,169 ft.)
/THE MATTERHORN, border between Switzerland and Italy (14,691 ft.)
/EVEREST (29,029 ft.), border between Nepal and Chin
/MT. WASHINGTON (6,288 ft), New Hampshire
/DENALI, Alaska (20,320 ft.
/Mt. Fuji, Japan (12,388 ft.)
images:
/ANNAPURNA, Central Nepal (26,545 ft.)
/NANGA PARBAT, Kashmir (26,657 ft.)
/SIULA GRANDE, Peruvian Andes (20,814 ft.)
/K2, border of Pakistan and China (28,251 ft.)
/KANGCHENJUNGA, border between India and Nepal (28,169 ft.)
/THE MATTERHORN, border between Switzerland and Italy (14,691 ft.)
/EVEREST (29,029 ft.), border between Nepal and Chin
/MT. WASHINGTON (6,288 ft), New Hampshire
/DENALI, Alaska (20,320 ft.
/Mt. Fuji, Japan (12,388 ft.)
images:
