Hiker pilgrim on the Camino de Santiago and GR 101, Asturias, Spain, Europe

Ramblers on the Cami de Cavalls, hiking trail GR 223, near Punta Negra on the North Coast, Menorca, Balearic Islands, Spain, Mediterranean, Europe

Hikers on the Cami de Cavalls, hiking trail GR 223, with the headland and watchtower Es Colomar in the background, s'Albufera des Grau Natural Park, Menorca, Balearic Islands, Spain, Mediterranean, Europe

Two Glaucous Gulls (Larus hyperboreus), Svalbard, Norway, Europe

Historic centre of Ghent, view of GrÂsten Palace, Belgium, Europe

Moncalvo National Truffle Fair, a big white truffle (Tuber magnatum) weighting 620 gr., Asti, Piedmont, Italy, Europe

Giant frogfish, Antennarius commersonii, Philippines, Bohol Sea, Pacific Ocean, Panglao Island, Bohol

Green leguan, green iguana, Iguana iguana, Costa Rica,

rice field, aerial view, Indonesia, Indian Ocean, Bali

rice field, aerial view, Indonesia, Indian Ocean, Bali

rice field, aerial view, Indonesia, Indian Ocean, Bali

Giant frogfish, Antennarius commersonii, Philippines, Bohol Sea, Pacific Ocean, Panglao Island, Bohol

Hiker contemplating the Lac du Lauvitel (1530 m) on the GR 54 long-distance hiking trail, Tour de l'Oisans et des Ecrins, Veneon valley, Ecrins National Park, Isere, France

Orientation post at Lac Lauvitel (1530 m) on the GR 54 Grande Randonnee trail, Tour de l'Oisans et des Ecrins, Veneon valley, Ecrins National Park, Isere, France

Lake Nino (1760m), horses grazing the grass around the pozzines (small pond of water surrounded by grassy lawns), stage on the GR 20 between the refuge of Manganu and the Col de Verghio or Castellu di Vergio, Haute-Corse, La France

Lake Nino (1760m), horses grazing the grass around the pozzines (small pond of water surrounded by grassy lawns), stage on the GR 20 between the refuge of Manganu and the Col de Verghio or Castellu di Vergio, Haute-Corse, La France

Vallee de La Claree, two hikers on the GR country of the Tour du Mont Thabor, flowering Rhododendron ferrugineux, in the background the Cerces massif (3093m), Nevache, Hautes-Alpes, France

Lac de l'Agneau (2039 m), Taillefer massif, hike to Plateau des Lacs (2068 m) via the GR 50 long-distance hiking trail, Matheysine, Oisans, Isere, France

Orientation post at Lac Noir (2039 m), Taillefer massif, hike to Plateau des Lacs (2068 m) via the GR 50 long-distance hiking trail, Matheysine, Oisans, Isere, France

Hiker on the suspended footbridge of Spasimata on the GR 20, Cirque de Bonifatu, Corsica Regional Nature Park, Balagne, Corse-du-Sud, France

Lac Fourchu (2053 m) seen from the GR 50 hiking trail, Taillefer massif, Matheysine, Oisans, Isere, France

Hiker on the suspended footbridge of Spasimata on the GR 20, Cirque de Bonifatu, Corsica Regional Nature Park, Balagne, Corse-du-Sud, France

Lake Nino (1760m) on the GR 20, stage between the refuge of Manganu and the Col de Verghio or Castellu di Vergio, in the background the Capu a Chiostru, Capu ai Sorbi and Monte Rotondo (2622m) in the center, Haute-Corse, France

Lake Nino (1760m) stage on the GR 20 between the refuge of Manganu and the Col de Verghio or Castellu di Vergio, horses grazing the grass around the pozzines (small pools of water surrounded by grassy lawns), Haute-Corse, France

GR 120 from Sangatte, also called Sentier du Littoral, it stretches along the Opal Coast, from the Belgian border to Berck-sur-Mer, Hauts de France, France