Photovoltaic solar tracker at a solar farm near Antissa, Lesbos (Lesvos), Greece. MORE INFO: Solar trackers automatically rotate and tilt photovoltaic panels to follow the sun throught the day, maximising sunlight absorpton rates. Several of these Solar farms have been built on Lesbos since 2010.

Solar farm with four Photovoltaic solar trackers, near Antissa, Lesbos (Lesvos), Greece. MORE INFO: Solar trackers automatically rotate and tilt photovoltaic panels to follow the sun throught the day, maximising sunlight absorpton rates. Several of these Solar farms have been built on Lesbos since 2010.

Pilot in front of flight info display screens, Terminal 2, Frankfurt Airport, Frankfurt, Hesse, Germany, Europe

Sign, Astrid Lindgren's former apartment, Dalagatan 46, Stockholm, Sweden, Scandinavia, Europe

In the foreground signpost to the pass summit of the highest navigable alpine pass Col de l'Iseran 2764 2770 metres high, Iseran Pass, Iseran, below direction signs to Lanslebourg and Bourg Saint Maurice, in the background chapel Chapelle Notre-Dame-de-Toute-Prudence, Col de l'Iseran, departmental road D902, Route des Grandes Alpes, Département Savoie, Region Auvergne-Rhône-Alpes, Graian Alps, France

Sign Zebras cross a gravel track in the Namibrand Nature Reserve in Namibia

Sign, particulate filer, For the sake of the environment, this vehicle is equipped with a particle filter

Sign, Sequoia National Park, California, USA, North America

Sex education ads, HIV/AIDS awareness, Guyana, South America

Porto Airport, display panel in the departure hall, Porto, Portugal, Europe

Duty-Free Shop and a departure board in the waiting area at a boarding gate, Fuerteventura Airport, Canary Islands, Germany, Europe

HIV/AIDS campain creating awareness concerning the myth of a "virgin cure", Magoye, Mazabuka, Zambia, Africa

Craftsman advertising panel reading Amt der Maurer on a building in the historic town, Moelln, Holstein, Schleswig-Holstein, Germany, Europe

Sign posts at Mt Field National Park, Tasmania, Australia, Oceania

Sign for a nudist beach, Texel, Holland, Netherlands, Europe

Sign for a nudist beach, Texel, Holland, Netherlands, Europe

Ischgl ski area boundary, Greitspitze Mountain, Samnaun, Switzerland, Tyrol, Austria, Europe

Langlois Bridge, Van Gogh Bridge, Arles, Bouches du Rhone, Provence, France, Europe

Automatic speed display board on the A9, wintery weather, Nuremberg, Middle Franconia, Bavaria Germany, Europe

Departure board, Doha International Airport, Doha, Qatar, Asia

Tourist information, map, meeting point, Avenue Baquedano, street, Clock Tower, national monument, Plaza Arturo Prat square, Iquique, Norte Grande, Northern Chile, Chile, South America

Restaurant-menu displaying asparagus special offer, Germany

Site plan, Santa Laura Saltpeter Works, UNESCO World Heritage Site, Atacama Desert, northern Chile, Chile, South America

QiGong-Feng Shui Square, the first scientifically investigated energy space of the earth by Prof. Karl-Heinz Kerll, Oberstdorf, Allgaeu, Bavaria, Germany, Europe

Information panels, museum, archeological site, Laodicea, Denizli, Lycia, Turkey, Asia

Information board at Mesa Verde National Park about the UNESCO World Heritage Site, Colorado, USA, North America

Entrance sign, Canyonlands National Park, Utah, United States, America

Information panel, Basilica of Saint Nicholas, Myra, Demre, Lycia, Turkey, Asia

Information sign, Darss, Nationalpark Vorpommersche Boddenlandschaft national park, Fischland-Darss-Zingst peninsula, Mecklenburg-Western Pomerania, Germany, Europe

Information posted at Pan's grotto, Temple of Pan in the Banias National Park, Golan Heights, Israel, Middle East, Southwest Asia

Old Fisherman's Wharf, sign in the harbour, Monterey, California, USA, North America

Das nasse Archiv area, information board on peat extraction and marsh biotope, Moormuseum Moordorf museum near Aurich, Suedbrookmerland, East Frisia, Lower Saxony, Germany, Europe

Tourists at a sidewalk cafe on the Rue d'Une Personne, Brussels, Belgium, Benelux, Europe

Signpost at the Gorafe megalithic park, Gorafe desert, Andalusia, Spain

Directions sign post, Queenstown, South Island, New Zealand

Passengers in front of flight info display screens, Terminal 2, Frankfurt Airport, Frankfurt, Hesse, Germany, Europe

Fortress in dry landscape, Ciudad Velha, Cidade Velha, island of Santiago, Cabo Verde, Africa

Information boards, Hartsfield-Jackson Atlanta International Airport, Atlanta Airport, Atlanta, USA, North America

Sandtorpark and the International Coffee Plaza office tower in HafenCity, Hamburg, Germany, Europe

Traditional scheduling board for timetable, manpower planning

Wood viewing platform, nature trail and information boards about the diversity of wood, Festung Ehrenbreitstein fortress, Federal Horticulture Show BUGA 2011, Koblenz, Rhineland-Palatinate, Germany, Europe

Memorial for the Dachau Death March near Schloss Blutenburg Castle, Munich, Bavaria, Germany, Europe, PublicGround

Aids HIV information in the african village Mukuni, Southern Province, Republic of Zambia, Africa

Keep with staircase and viewing platform of the Ruine Hohenhewen ruins, Landkreis Konstanz county, Baden-Wuerttemberg, Germany, Europe

Banff Upper Hot Springs, Banff National Park, Alberta, Canada

Information panels, museum and archaeological site, Laodicea, Denizli, Lycia, Turkey, Asia

Traditional scheduling board for timetable, manpower planning

Information board Zwieslerwaldhaus, Bavarian Forest, Bavaria, Germany, Europe

Departure times of Renfe trains in Atocha Station, Madrid, Spain, Europe

Political information display, Berlin, Germany, Europe

Map with hiking trails, Teide National Park, Tenerife, Canary Islands, Spain, Europe