DGA1134341: Palm tree in front of a building, Santo Domingo, Dominican Republic (photo) / Bridgeman Images

DGA1134347: Rosengarten Massif with Vajolet Towers in center, Dolomites, Trentino-Alto Adige, Italy (photo) / Bridgeman Images

DGA1134352: Karst erosion formations, Lessini Mountains, Veneto, Italy (photo) / Bridgeman Images

DGA1134353: Serio River waterfall during opening of Barbellino dam, Upper Seriana Valley, Bergamo, Italy (photo) / Bridgeman Images

DGA1135357: Velan, Menouve Valley, Valle d'Aosta, Italy (photo) / Bridgeman Images

DGA1135362: Italy, Valle d'Aosta, Graian Alps, Mont Blanc Massif, Mont Dolent hills (photo) / Bridgeman Images

DGA1135374: Italy, Valle d'Aosta, Pennine Alps, Valpelline, View of Glacier du Mont Collon from Punta Kurz (photo) / Bridgeman Images

DGA1135376: Italy, Valle d'Aosta, Brissogne, Laures Valley (photo) / Bridgeman Images

DGA1135377: Italy, Valle d'Aosta, Dora Baltea Valley, Lake Basso in Laures Valley (photo) / Bridgeman Images

DGA1135381: Italy, Valle d'Aosta, Valtournenche, Pollux seen from Col di Nana (photo) / Bridgeman Images

DGA1135388: Italy, Trentino-Alto Adige, Badia Valley, Puez-Odle Nature Park, Sassongher mountain (2665 meters) (photo) / Bridgeman Images

DGA1135389: Italy, Trentino-Alto Adige, Earth Pyramids on Renon plateau (photo) / Bridgeman Images

DGA1135390: Italy, Trentino-Alto Adige, Earth Pyramids on Renon plateau (photo) / Bridgeman Images

DGA1135395: Niger, Sahara Desert, Tenere desert, Monoliths rock eroded by wind (photo) / Bridgeman Images

DGA1135426: Italy, Valle d'Aosta, Valsavarenche, Gran Paradiso Massif, Herbetet (photo) / Bridgeman Images

DGA1135427: Italy, Valle d'Aosta, Saint-Nicolas, Badlands and earth pyramids (photo) / Bridgeman Images

DGA1135429: Italy, Valle d'Aosta, Pennine Alps, Breithorn in Monte Rosa Massif (photo) / Bridgeman Images

DGA1135437: Jordan, Petra, Sandstone formation, close-up (photo) / Bridgeman Images

DGA1135441: Italy, Piedmont, Valle Germanasca, Grand Queyro (photo) / Bridgeman Images

DGA1135444: Italy, Trentino-Alto Adige, Segonzano, Erosion of pyramids, locally known as Omeni (photo) / Bridgeman Images

DGA1135452: Italy, Lombardy, Val Camonica, Summit of Adamello (3539 meters) (photo) / Bridgeman Images

DGA1135454: France, Rhone-Alpes, Aiguille d'Argentiere mountain (3901 meters) (photo) / Bridgeman Images

DGA1135459: France, Rhone-Alpes, Pic du Thabor (3178 meters) (photo) / Bridgeman Images

DGA1135460: France, Rhone-Alpes, Pic du Thabor (3178 meters) (photo) / Bridgeman Images

DGA1135467: Algeria, Sahara Desert, Result of erosion in Tassili n'Ajjer mountain range (UNESCO World Heritage List, 1982) (photo) / Bridgeman Images

DGA1135470: Algeria, Sahara Desert, Result of erosion in Tassili n'Ajjer mountain range (UNESCO World Heritage Lis (photo) / Bridgeman Images

DGA1135473: Sahara Desert, Effects of drought on land (photo) / Bridgeman Images

DGA1135474: Algeria, Sahara Desert in Tadrart region (photo) / Bridgeman Images

DGA1135475: Algeria, Sahara Desert, Result of erosion in Tassili n'Ajjer mountain range (UNESCO World Heritage List, 1982) (photo) / Bridgeman Images

DGA1135480: Algeria, Sahara Desert, Atakor highland part of Hoggar massif (photo) / Bridgeman Images

DGA1135482: Italy, Campania, Castelcivita Caves, Limestone waterfall (photo) / Bridgeman Images

DGA1135485: Italy, Lombardy, Val Porcellizzo, Piz Badile and Piz Cengalo, side view of Val Masino (photo) / Bridgeman Images

DGA1135494: Italy, Sardinia, Caprera Island, Punta Galera, Red rocks (photo) / Bridgeman Images

DGA1135499: Italy, Sardinia, Castelsardo, Elephant rock (photo) / Bridgeman Images

DGA1135501: Italy, Tolfa Mountains, Sassoni di Furbara mountain (photo) / Bridgeman Images

DGA1135503: South Africa, Little Karoo, Cango Caves, Calcite formations (photo) / Bridgeman Images