Sand dunes at sunset near the Ounianga lakes, UNESCO World Heritage Site, Chad, Africa

travel destination photography vertical colour image sun sunlight glowing outdoors sunset dramatic sky landscape scenics physical geography non urban scene tranquil scene tranquillity beauty in nature unesco world heritage site unesco africa rippled lens flare sand chad footprint journey absence no people horizon over land ounianga lakes lakes of ounianga colour color image color outdoor outside tourist destination travel horizon horizons nobody no one no one topography scenery scenic scene scenes picturesque nature the natural world tranquility serene serenity peaceful unesco world heritage sites world heritage site world heritage sites sundown dusk twilight