I am a strong believer in taking a walk- whether it be in the city, on the beach, with a stroller or with a pooch, holding hands or flying solo- walking is the best way to take a place in and, as a bonus, the fresh air never hurts.
The decks would be a great gift for folks planning trips to these destinations, but I also think picking up the deck of a city where you happen to live could be great too- there is always more out there to see and do!