The cowpea (Vigna unguiculata) is one of several species of the widely cultivated genus Vigna.Four subspecies are recognised, of which three are cultivated (more exist, including V. textilis, V. pubescens, and V. sinensis):ccording to the USDA food database, the leaves of the cowpea plant have the highest percentage of calories from protein among vegetarian foods.
1 Victoria Falls - 108 m (354 ft) high; widest in Africa and one of the widest in the world.  Mutarazi Falls - 762 m (2,500 ft) high; highest in Zimbabwe, second highest in Africa and 17th highest in the world.
World's Highest Waterfall. Angel Falls (Salto Ãngel) in Venezuela is the highest waterfall in the world. The falls are 3230 feet in height, with an uninterrupted drop of 2647 feet. Angel Falls is located on a tributary of the Rio Caroni.