The one accessory you never want to forget when traveling to sunny, colorful locals is the polarizing filter. This item alone will separate your images from those around you.
I recently explored the streets of St. George, Bermuda, and the Royal Naval Dockyard with my Canon 5D Mark II with 24-105mm zoom and a circular polarizer. Even though it's only a 2 hour flight from the Atlantic Coast of the US, St. George feels another world away. I was able to better show the texture and color of this town using the polarizing filter on a sunny day.
Later, in class, many of my students asked why my shots looked so much different than theirs. I cited the pola might be a factor, then asked how many remembered to pack one. No one did. Don't let this happen to you!
Rusty beams during a stop over at the Royal Na val Dockyard in Bermuda. Captured with a Canon 5D Mark II, 24-105mm f/4 zoom with a circular polarizer. Click on image for larger version. Visit the TDS Flickr Gallery for more images from Bermuda shot this way.
To see the entire collection, visit the TDS Flickr Gallery.