Bandera Volcano rose up in volcanic fury some 10,000 years ago. The crater is approximately 1400 feet across and 800 feet deep. Bandera is one of the finest examples of an erupted volcano in the country, and one of the most accessible. An ancient lava trail leads to a collapsed lava tube. Inside the Ice Cave, the temperature never rises above 31 degrees F. Here, the natural layers of perpetual ice glisten blue-green in the reflected rays of sunlight.