An old oil refinery chimney located in Parque das Nações, Lisbon. The refinery has been deactivated for many years, but the chimney remains in what is now part of an expensive neighborhood.
The photo was taken at the end of the day with a clear sky.
Most of the highlights are original from how the sun was hitting the structure. But the photo was editted to darken the corners where the round structure ended to give it an effect of being truly surounded in darkeness.
There was also some soft selection and B&W gradient mapping applied to the structure to enhance the light.