COMFORTABLE WALKING SHOES....I cannot stress this enough!! On a map it may not seem far from one monument to another but it is....I walked 15 miles in one day of touring. There are several places to stop and take a rest but you will do a lot of walking! A light waterproof jacket in spring and fall.
Not much need for sunblock unless you come in the middle of Summer. A small first aid kit isn't a bad idea for when out touring especially if you are walking (don't forget pain medication for the leg cramps and sore feet). Bring lots of bottled water.
Most of your shots will be distance shots as the monuments here are large. I suggest an extra flash for fill lighting as some of the interiors of the monuments tend to run a bit dim. A second memory card and battery is a must, also, would suggest a tripod to steady those long shots if you are using a large lens.
