vallées
| Nom | Type | Notoriété | Popularité |
|---|---|---|---|
| Titus Canyon | Relief | 5 | 0.2 |
| Toodyay Valley | Relief | 2 | 0.0 |
| Topanga Canyon | Relief | 3 | 10.0 |
| Tornédalie | Relief | 23 | 1.9 |
| Torrent du Manival | Relief | 2 | 0.5 |
| Trans-pecos | Relief | 10 | 0.7 |
| Treasure Valley | Relief | 3 | 0.0 |
| Trièves | Relief | 6 | 38.7 |
| Trois Gorges | Relief | 24 | 9.4 |
| Trossachs | Relief | 14 | 3.7 |
| Trotters Gorge | Relief | 2 | 0.0 |
| Trou Blanc | Relief | 1 | 0.5 |
| Trou de Bozouls | Relief | 3 | 25.3 |
| Trou de Fer | Relief | 12 | 31.5 |
| Trouée D'annecy | Relief | 1 | 0.0 |
| Trouée des Marches | Relief | 2 | 0.3 |
| Tseï | Relief | 7 | 0.3 |
| Tungudalur | Relief | 3 | 0.6 |
| Turtmanntal | Relief | 7 | 1.3 |
| Tuxertal | Relief | 10 | 0.0 |
| Tyropϙn | Relief | 12 | 1.1 |
| Urseren | Relief | 14 | 1.7 |
| Utladalen | Relief | 7 | 0.1 |
| Vaituha | Relief | 2 | 0.3 |
| Val Badia | Relief | 20 | 2.5 |
| Val Bisagno | Relief | 7 | 0.7 |
| Val Bognanco | Relief | 6 | 0.3 |
| Val Bregaglia | Relief | 24 | 10.5 |
| Val Cairasca | Relief | 4 | 0.3 |
| Val Calanca | Relief | 13 | 2.8 |
| Val Camonica | Relief | 37 | 19.5 |
| Val Cavallina | Relief | 6 | 0.1 |
| Val Cavargna | Relief | 5 | 0.3 |
| Val Cenise | Relief | 4 | 0.0 |
| Val Chauselle | Relief | 5 | 0.3 |
| Val Clarea | Relief | 2 | 0.0 |
| Val Clavalité | Relief | 3 | 0.3 |
| Val Cluozza | Relief | 4 | 0.6 |
| Val Cluson | Relief | 12 | 2.5 |
| Val Codera | Relief | 6 | 0.0 |
| Val Coisin | Relief | 1 | 0.1 |
| Val Cordevole | Relief | 2 | 0.0 |
| Val D'abondance | Relief | 2 | 8.9 |
| Val D'agrò | Relief | 4 | 0.1 |
| Val D'anniviers | Relief | 17 | 11.7 |
| Val D'ansiei | Relief | 4 | 0.0 |
| Val D'argent | Relief | 1 | 7.0 |
| Val D'arly | Relief | 2 | 8.6 |
| Val D'ayas | Relief | 6 | 2.8 |
| Val D'azun | Relief | 1 | 8.5 |