5+ Lava Flow Trail. This is a very popular area for walking, so you'll likely encounter other people while exploring. Lava is brittle, unstable, and sharp!
It is a nearly mile paved loop around the lava field of sunset crater volcano that exploded 1,000 years ago. There are plaques featuring pictures, diagrams, and descriptions located throughout the paved section. This is one of the premier hikes of sunset crater volcano national monument.