Petrochemical refinery photographed at high tide.

Sunset over oil refinery of Leça da Palmeira, near Porto in Portugal.

High tide on the western coast of Portugal occurs every 12 hours. It happens because of the moon's gravitational force that pulls on water in the oceans.
The difference in sea levels can reach almost 6 meters.

Model: NIKON D80
Date/time: 2009-03-14 18:36:00
Exposure Program: Aperture priority
ISO: 400
Metering Mode: Pattern
Flash: Did not fire
Focal length: 100 mm
Lens: AS-F Nikkor 70.0-300 mm VR
ND 0,4

April 2009.