Travel to Flagstaff to the well-known Coconino National Forest. For it is there you can explore the long lava tube known as the Lava River Cave. It was formed by a large volcanic eruption about 700,000 years ago.
If you want to cool off, the best time to visit is in the summer. The caves are, on average, only 40 degrees Fahrenheit and you might even spot a bit of ice. Even in the summer, you should take thick clothing, because the cave and its connected caverns can actually drop to under 30 degrees.
You’ll have to do your homework before entering though since it is a “self-guided trip.” Another reason to visit in the warmer months is that the roads can be shut down in the winter. In fact, in the winter the more athletic visitors can actually ski into this cave when there’s enough snow. So check on road conditions if you’re interested. Admission is free.
The colossal cave system called Colossal Cave is conveniently situated 22 miles out of Tucson. More specifically, it’s located in a beautiful, 2,400-acre mountain park. It includes some of the area’s best caves.
You can learn about the cave’s interesting geological composition, history, and legends by taking the popular half-mile guided tour. One of the most popular tours takes less than one hour.
Walking down almost 400 steps here will make you seem as if you’re on a journey to the center of the earth. The tours are offered daily and the price charged depends on your choice of tour. The classic cave tour is family-friendly and no extra equipment is required.
The most challenging is the three-and-a-half-mile tour is the most in-depth and rigorous. Be warned, you will get dirty, trekking through small passageways, pitch-black tunnels, and tight spaces. Schedule your visit at the right time and watch hundreds of bats fly from these caves after sunset. Admission is free.