This is located in the Sangre de Cristo Mountains of New Mexico. There are trails to follow that will allow you to see inside the extinct volcano. The lower trail is only about .2 miles and allows you to go inside a vent to see inside the volcano. The longer upper trail winds one mile around the crater rim. You can see evidence of the eruptions throughout the volcanic hills by the lava rock located on the hills and mesas. The trails are self guided and fairly easy to hike.
That I'd like to see.