Jaipur is one of India's most historic cities. Amer Fort is a fabulous place to visit, and the old Pink City is fascinating. There are so many forts and palaces of India that leave one speechless. One can imagine what a rich country India must have been, not just financially, but artistically. It's a pity most modern urban architecture has lost these artistic sensibilities, and also the very useful practice of using materials that work for the climate, instead of against it.
At Amer Fort one can walk, ride on an elephant, or drive up to the fort itself. I highly recommend walking, as it gives you a chance to truly admire the place. Watch out for elephants showering you with their sneezes!