A perfect mirror

A story behind: As usual at the end of the evening we stopped at the Foz beach to drink a cup of coffee with just a drop of milk or "pingo" as they call it here in Northern Portugal. The weather was fine. Almost no wind, 17º temperature, nice sky. Simple and tranquil life.
When the sun went down I put my gear and shot some photos. Some ships could be seen on the distant horizon.

Location: Foz beach , Porto, Portugal

Gear: Nikon D80, Sigma 10-20mm, tripod, remote control, Tiffen 0.9 hard

Post-processing: RAW to Tiff, white balance, sharp, saved as jpg.

Aperture: f/8

Focal Length: 11,5 mm

ISO: 100

Date Taken: April 17th, 2010, 20:20