What is the best place to eat in Playa del Carmen within walking distance to 5th street?
Without a doubt, La Perla Pixán Cuisine & Mezcal Store.. See the second point for details: Just a Pack's Top Ten Things to do in Playa del Carmen, Mexico
Maiz De Mar, no doubt. It's on Plaza Cacao right on the North side of 5th avenue. Around 34th street.