Wikipedia:POTD column/December 14, 2006

A large bolt of lightning strikes west of downtown Denver, Colorado, with the Qwest Tower (center) in plain view. Denver, known as the "Mile-High City" because its official elevation is one mile (1.6 km), is the capital and largest city of the U.S. state of Colorado. In the spring and summer, Denver is subject to monsoon conditions with frequent thunderstorms.

Photo credit: Dag Peak
Archive - More featured pictures...