the spot is named Plaza Larimar across the street of banco de progreso.
from the iberostar hotel you grab the public bus, $1.- per person per ride, it is just a 10 minues drive. the plaza is small, the orange shop has big signs on, so you can't miss it.
to get back to the hotel you stop the bus across the street, they drop you off close to the hotel's entrance.
have fun
Mike