Charming Spanish colonial architecture and cobblestone streets, at least for the central tourist areas. In the non-touristy areas, Cuba has a real housing problem. Crumbling concrete and brick buildings, battered by tropical sun and hurricanes, have been neglected for decades. Cubans have few resources (no Home Depot here) nor could they afford concrete and lumber if they could find it. Housing is assigned by the government, so you might be on an eternal waiting list for a different home.