Photos of beaches.
A beach or strand is a geological formation consisting of loose rock particles such as sand, shingle, cobble, or even shell along the shoreline of a body of water.
Pictures of bridges. A bridge is a structure built to span a gorge, valley, road, railroad track, river, body of water, or any other physical obstacle. Designs of bridges will vary depending on the function of the bridge and the nature of the...
Pictures of glaciers.
A glacier is a large, long-lasting river of ice that is formed on land and moves in response to gravity. A glacier is formed by multi-year ice accretion in sloping terrain.
Pictures of lighthouses.
An aid for navigation and pilotage at sea, a lighthouse is a tower building or framework sending out light from a system of lamps and lenses or, in older times, from a fire.
Pictures of mountains.
A mountain is a landform that extends above the surrounding terrain in a limited area. A mountain is generally much higher and steeper than a hill, but there is considerable overlap, and usage often depends on local custom....
Pictures taken in rural areas.
Rural areas are sparsely settled places away from the influence of large cities and towns. Such areas are distinct from more intensively settled urban and suburban areas, and also from unsettled lands such as...
Pictures of sailing ships.
A tall ship is a large traditionally rigged sailing vessel. Popular modern tall ship rigs include topsail schooners, brigantines, brigs and barques.
Pictures taken in the tropics.
The tropics are the geographic region of the Earth centered on the equator and limited in latitude by the two tropics: the Tropic of Cancer (23° 26' 22" N) in the north and the Tropic of Capricorn (23° 26' 22" S) in...
Pictures of waterfalls. A waterfall is usually a geological formation resulting from water, often in the form of a stream, flowing over an erosion-resistant rock formation that forms a sudden break in elevation or nickpoint.
Pictures of wilderness.
Wilderness is land that has not been significantly modified by direct or indirect human activity. Biosphere scientists and landscape ecologists consider wilderness areas to be an integral part of the self-sustaining...
The world's smallest/biggest/highest etc.
This category may apply to both human made structures such as towers and bridges, but also nature; animals, vegetation and geology.