Rabelo Boats on the River Douro, Porto, Norte, Portugal, Europe

View of the Meteora Monasteries, UNESCO World Heritage Site, Thessaly, Greece, Europe

View of the Meteora Monasteries, UNESCO World Heritage Site, Thessaly, Greece, Europe

Your Rainbow Panorama, a circular skywalk with windows in the colors of the rainbow, by Olafur Eliasson, Danish-Icelandic artist, on the top of ARoS Aarhus Kunstmuseum, designed by Danish architects Schmidt Hammer Lassen, Aarhus, Jutland, Denmark, Europe

View of clock tower of Greek Orthodox Church, Theologos, Thassos, Aegean Sea, Greek Islands, Greece, Europe

Elevated view of bell towers of Cusco (Cuzco) Cathedral, UNESCO World Heritage Site, Cusco (Cuzco), Cusco Province, Cusco Region, Peru, South America

Mont-Saint-Michel bay and Abbey, UNESCO World Heritage Site, Manche department, Normandy region, France, Europe

Rocky cliffs of Shpella e Pirateve tourist attraction, Albania, Europe

Basilica Cistern with an orange illumination. Istanbul, Turkey, Europe

The Roman amphitheatre of El Jem, a UNESCO World Heritage site, is an oval amphitheatre in the modern-day city of El Jem, Tunisia (formerly Thysdrus in the Roman province of Africa)

Ishak Pasha Palance, a unique Ottoman palace and mosque in Doğubeyazıt district, Ağrı province, eastern Turkey

The Moon in mid-total eclipse, on January 20, 2019, with it shining beside the Beehive star cluster, Messier 44, in Cancer. This was the unique sight at this eclipse as it can happen only during total lunar eclipses that occur in late January. There was one on January 31, 2018 but the next will not be until 2037.

Views of Dubai, here the Burj Al Arab Hotel taken from the sea side, Dubai, United Arab Emirates, Middle East

Views from the 50th floor of the Aura Skypool, Dubai, United Arab Emirates, Middle East

Biosphere 2, self-sustaining ecosystem, lodgings of mission's scientists, Oracle, Arizona, USA, North America

Illuminated Golden Rock at night with Kyaiktiyo Pagoda, Kyaikto, Thaton District, Mon State, Myanmar, Asia

The unique experience of visiting the desert makes Wadi Rum a worthwhile stop on a visit to Jordan. Dozens of Beduin camps offer tourists beduin camping in the desert under clear skies

The unique experience of visiting this beautiful desert on camels makes Wadi Rum a worthwhile stop on a visit to Jordan. Dozens of Beduin-run tours cater to tourism

The unique experience of visiting the beautiful desert makes Wadi Rum a worthwhile stop on a visit to Jordan. Dozens of Beduin camps cater offer tourist campsites in the desert under clear skies

The unique experience of visiting this beautiful desert makes Wadi Rum a worthwhile stop on a visit to Jordan. Dozens of Beduin camps cater to tourism offering camps in the desert under clear skies

The unique experience of visiting this beautiful desert on offroad vehicles makes Wadi Rum a worthwhile stop on a visit to Jordan. Dozens of Beduin-run tours cater to tourism

The unique experience of visiting the desert makes Wadi Rum a worthwhile stop on a visit to Jordan. Dozens of Beduin camps offer tourist accommodation in the desert under the clear skies

Biosphere 2, self-sustaining ecosystem, Oracle, Arizona, USA, North America

ANTWERP, BELGIUM, MAY 27, 2018: Antwerp port administration headquarters, designed by famous iranian architect Zaha Hadid, Antwerpen, Belgium illuminated at night

Biosphere 2, self-sustaining ecosystem, cactus in front of facility with tropical rainforest, Oracle, Arizona, USA, North America

Biosphere 2, self-sustaining ecosystem, Oracle, Arizona, USA, North America

Suspension railway station Kluse with outgoing train, Elberfeld, Wuppertal, Germany

Biosphere 2, self-sustaining ecosystem, Oracle, Arizona, USA, North America