there is still magma, hot, molten magma. as a result, the groundwater and river water that come in contact when it puts -- pushes backup creates hot springs. in addition to being sure of the year -- geothermal and hot in the riverbed, they contain an element known as radium, which has a radioactive half-life. there are a lot of of people believe it has there. healing properties, medicinal properties, but this is what has attracted people for thousands of years to this area, this water in the desert and these hot springs. >> when you say thousands of years, you mean early to the area. alex: early to the settlers. this area we are looking at is a mountain range. the mountains you see are the highest you see in the area. they are just shy of 9000 feet above sea level. between here and those two mountain ranges are prehistoric villages and artifacts from , 10le from the last ice age to 12,000 years ago, two people from the archaic. ago, to the00 years ancestors of today's modern pueblo people. we still have modern pueblo people