Pass by the Arch as you walk from the Colosseum to the Forum entrance. Take zoom photos of individual carvings and inscriptions to study later. This massive work of art is fascinating. Also get a good view from the top of the small rise as you walk into the Forum area- great for photos from this vantage point. It's mind-boggling to comtemplate the history of the Arch, the Colosseum next to it, and the Forum. Just fabulous.The dress-up gladiator guys want money if you so much as look at them.