Canadian Couple Maps 140 Cenotes Across Mexico's Yucatán

For Canadian forester David Palmer and his wife Doris Demers, retirement meant diving headfirst into an extraordinary mission: finding and documenting as many of Mexico's magical cenotes as possible. After visiting 140 of these natural sinkholes, they're sharing their discoveries in a new guidebook launching this month.

"I've never seen a cenote I didn't like," Palmer says. The couple sometimes explores two or three per day during their month-long visits to the Yucatán Peninsula.

Cenotes are natural sinkholes filled with crystal-clear water, created when limestone bedrock collapses to reveal groundwater below. The Yucatán Peninsula has an estimated 10,000 cenotes, though only about 250 are accessible to visitors since most remain buried underground.

These ancient water sources weren't just beautiful. They were essential to Maya civilization's growth and survival in a region with almost no surface rivers.

The guidebook idea sparked during a chance encounter at a bookstore in Puerto Morelos, Quintana Roo. The Canadian owners told Palmer that tourists constantly asked for an English-language cenote guide, but none existed.

"Now that piqued my interest," Palmer said. "Since we were going around looking at them anyway, we started to keep an account."

The Ripple Effect

Palmer's documentation work comes at a crucial time. As urbanization increases across the Yucatán, these natural wonders face new pressures from development and wastewater concerns.

His guidebook, "A Guide to the Cenotes of the Yucatán Peninsula," preserves detailed information about each site's location, history, and unique features. Palmer describes cenotes ranging from the downtown Valladolid showstopper Cenote Zaci to the underground marvel Dzitnup, which National Geographic featured on its 1995 cover.

At Cenote X'Batun, jungle birds including colorful kiskadees and orioles gather around turquoise waters. Nearby Cenote X'ooch has become Instagram famous for its stunning Alamo tree roots cascading into shimmering blue water.

The couple's work helps both tourists and researchers understand these geological treasures. The Sistema Ox Bel Ha, stretching across vast areas of the peninsula, is now recognized as the world's longest underwater cave system.

Palmer hopes their guidebook inspires others to appreciate these natural wonders while respecting their cultural significance and environmental fragility.