Reflection of Margaret Hunt Hill Bridge in seasonal pond of the Trinity River, Dallas.  Reflections are nice, but I usually love them more when they show something, like this rock against the reflected bridge.

The key is a nice still day plus a long enough exposure to smooth out all the ripples.  Here I used a polarizer (loses 2 stops of light), slow ISO and really small aperture to get this daytime exposure down to almost 3 seconds.

Margaret Hunt Hill Bridge ReflectionCanon 1Ds Mark III.  70 mm.  ISO 50.  Polarized.  f/32 @ 2.5 seconds.