THE SELL: The six canyons that comprise the Copper are six times as long and 1,000 feet deeper than the Grand Canyon. Adventure Life’s new ten-day trek guides guests to the alpine upper rims and the tropical canyon floor. $2,875.
THE RISK: Copper Canyon is famously good for growing cannabis.
SKETCH FACTOR: Low. “Sure, there are farmers who harvest marijuana, but it’s not dangerous,” says Maria Walton, codirector of Ultramarathon Caballo Blanco. “I’ve traveled there alone at least a dozen times.”