The water rush­ing over the Basaltic Prisms of San­ta María Regla make the ancient pil­lars look espe­cial­ly sur­re­al. The columns are polyg­o­nal and vary in height from 100 to more than 150 feet tall. They con­tain a ravine whose water flows from the San Anto­nio Dam, often times caus­ing a rain­bow to form at the base of two water­falls. The tourist attrac­tion is locat­ed in Hilda­go, Mex­i­co, and can be enjoyed via walk­ways and hang­ing bridges.