Kantenah is a small stretch of beach next to Puerto Aventuras that is essentially made up of the Grand Palladium Resort. The expansive resort sits across much of the beachfront among the lush vegetation and boasts numerous suites and cabins on or near the beachfront. Further north from here, however, you can find great places to snorkel and the beach in front of the El Dorado Resort has lots of coral.
Kantenah is located about 34km south of Playa del Carmen. If you blink driving down Hwy 307 you will miss the small sign on the highway announcing its presence. The access point for the beach is immediately south of the El Dorado Spa & Resort.