| TATRAMOUNTAINS | Series of peaks forming a natural border between Slovakia and Poland (5,9) |
| TATRA | Highest mountain range in the Carpathians, forming a natural border between Slovakia and Poland (5) |
| PYRENEES | Rising 11,168ft to its highest point at Pico d'Aneto, a range of mountains forming a natural border between France and Spain (8) |
| RORAIMA | Forming a natural border between Venezuela, Brazil and Guyana, the mountain that inspired Arthur Conan Doyle to write The Lost World (7) |
| ATLASMOUNTAINS | Series of peaks crossing northwestern Africa |
| MORAVA | River that forms the border between Slovakia and Austria |
| ALTAIMOUNTAINS | Range of peaks in Asia where Russia, China, Mongolia and Kazakhstan converge (5,9) |
| ROCKYMOUNTAINS | Vast system of peaks in North America (5,9) |
| AMUR | River of NE Asia forming the natural border between China and Russia; Chinese name, Heilong Jiang (4) |
| ZAMBEZI | River forming natural border between Zimbabwe and Zambia (7) |
| ALPS | First character records a series of peaks (4) |
| SEA | Taoiseach content with the natural border between Ireland and Britain, for example (3) |
| MASSIF | From poles, with temperature dropping, one following series of peaks |
| ORANGE | First overhang on series of peaks in free state at one time (6) |
| RANGE | Series of peaks cameraman finally captured in storm (5) |
| SHRUB | Part of a natural border, maybe |
| URAL | ___ Mountains; range forming a natural boundary between Asia and Europe (4) |
| TAMAR | River forming a natural boundary between Cornwall and Devon (5) |
| URALS | Natural border between Europe and Asia |
| MOUNTAINCHAIN | Series of peaks |
