Tuzigoot National Monument is a beautifully preserved 110 room Sinagua pueblo perched on a hilltop overlooking the Verde Valley. It's an easy educational stop for anyone exploring the Cottonwood/Sedona area. The National Monument is open most days and entry is typically around $10 per person or covered by an America the Beautiful Pass (aka a national parks pass).
Expect a short, accessible walk through the ruins, panoramic desert views, and a succinct visitor center that gives great context to the ancient culture that once lived here. This national monument pairs nicely with nearby Verde Valley stops like Montezuma Castle, the Verde Canyon Railroad, and one of the nearby wineries if you want to make a day out of it.