Next, we stopped for lunch at one of the hundreds of cenotes in the Yucatan. Cenotes are sink holes in the porous limestone of the area. They fill with water and with no natural in or out flows, they remain amazingly clear. Some have underwater caves that go on for miles. I took the plunge into one, the Santa Cruz Cenote, and swum around diving down to look into the cracks and crevasses of the unique underwater formations. After the dip in the cool water, we co...