The Old Man of Hoy, 150m sea stack, Hoy, Orkney Islands, Scotland, UK, Europe

Erg Chebbi Sahara Desert sunset from the top of a 150m sand dune, near Merzouga, Morocco, North Africa, Africa

Sunset at Erg Chebbi Desert from the top of a 150m sand dune, Sahara Desert near Merzouga, Morocco, North Africa, Africa

Highland Light (Cape Cod Light). The station was established in 1797, the present buildings date from 1857. At that time, the lighthouse was still 150m away from the 40m cliffs, but continuing erosion imperiled the location. At the end of the 20th century

Highland Light (Cape Cod Light). The station was established in 1797, the present buildings date from 1857. At that time, the lighthouse was still 150m away from the 40m cliffs, but continuing erosion imperiled the location. At the end of the 20th century

Highland Light (Cape Cod Light). The station was established in 1797, the present buildings date from 1857. At that time, the lighthouse was still 150m away from the 40m cliffs, but continuing erosion imperiled the location. At the end of the 20th century