Casco Viejo is a UNESCO site located in Panama City, Panama. We stayed in the quarter at Las Clementinas (www.lasclementinas.com), a really lovely and comfortable hotel with an amazing rooftop patio and view of downtown. Casco is a great mix of locals and visitors. As we enjoyed the sun on the balcony of the hotel, we could see the locals gather down below on the sidewalk to play an informal game of bingo. Casco is in the process of being revitalized but it still has the old colonial feel and is a great spot for unique restaurants and nightlife.