This is the engine compartment of the historic PD-DRESDEN. A German built steam powered paddle boat from 1926. Amazingly it had been in service till its modernization in 1993, when the twin piston 300hp steam plant was converted from coal /steam to gas/steam .
Shot in RAW with my D90 and 18/105 Nikkor VR lens . HDR from 3 exposures +/- 0.5 ev .Edit in photomatix and NX2