BASE jumping is the recreational sport of jumping from fixed objects, using a parachute to descend safely to the ground. The
acronym stands for four categories of fixed objects from which the jumps can be made:
buildings,
antennae,
spans, and earth (
cliffs). In this photograph, a BASE jumper launches himself from the top of the Sapphire Tower in
Istanbul, Turkey.
Photograph credit: Kontizas Dimitrios