App 300 buzones mágicos de Correos

It invites users to find the Correos’ 300 “magic” mailboxes that are located throughout Spain.
The participants in this Gymkana game can recognize the magic mailboxes with their device’s camera. This action will award points, which they can also gain by answering questions correctly and / or sharing their experiences in social networks. Everybody lives Correos Anniversary and competes to enjoy an attractive trip.