The Hotel El Convento in Old San Juan, Puerto Rico was a carmelite convent. It was built in the mid-1600s and now is a great building loaded with character and coquis chirping away in the plant-filled courtyard. The kids and I loved one particular detail. About every 20 feet on each of three or four extremely long wrap-around verandahs was placed a freestanding ashtray filled with sand on the top. Pressed into the sand of each ashtray was an architectural rendering of the facade of El Convento. We loved that and despite the temptation, particularly on the part of a certain 7 year old young lady, I never let them mess it up.