Visiting a cenote when in Mexico’s Yucatán is simply a must-do. The experience is somewhere between mystical and serene – every traveler in search of natural beauty in this Mayan region will agree.

YUCATAN PENINSULA, Mexico — A hand-painted arrow on the wooden sign pointed down a desolate road. A few wrong turns later, while bumping along in our rental car, a middle-aged man in a baseball hat ...