il s'agit pour débuter du compte-rendu journalier des observations naturalistes agrémentées de photos, réalisées lors d'un séjour en Espagne fin mai début juin 2005.
il se développe depuis avec mes photos issues de Balades en Nature ou de Voyages.
En 2002, un séjour au Pérou m'a permis de découvrir la ville de Arequipa et sa région marquée par le volcanisme : le paysage est un amas de cendres volcaniques plus ou moins raviné ; les édifices du centre historique sont construits en sillar, du tuf volcanique contenant cendres et scories de petites tailles agglomérés par la température et la pression, fournissant le surnom d'Arequipa : la ville blanche ; des carrières à sillar existent en dehors de Arequipa.
Le centre-ville est composé d'une grande place, la place d'armes, comme à Cuzco (héritage des colonisateurs espagnols) et d'édifices religieux (église de la compagnie de Jésus - les jésuites, je crois -, église de St Jean-Baptiste de Yanahuara, et couvent de Ste Catalina (très coloré à l’intérieur de son enceinte blanche), etc. ; on peut admirer à l'horizon de Arequipa (non loin) 3 volcans, dont 2 photographiés), Chachani (éteint) et Misti (actif mais au repos, la dernière éruption remontant à 1985) et Pichu pichu, non photographié ici.
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