Woul­da, shoul­da, coul­da. Along with every­thing else, the Yucatan penin­su­la is also known for its cenotes, or sort of sink­hole caves, result­ing from the lime­stone geol­o­gy. There are too many to vis­it, but we had a hard time pick­ing even one to vis­it. We were dri­ving by them in the mid­dle of our trip and should...