We make one last stop before leaving the Huasteca Potosina region at the Sotano Golindrinas, or Cave of the Swallows.  Falling just six feet short of being 1,000 ft wide at it’s widest point, this air pit cave is over 1,200 ft drop from its highest karst ridge overhead, making it (according to wikipedia) “the largest known cave shaft in the world.”  Although swarms of birds are reported, Continue reading →