Av A Waked, Corredor Zona Libre Millennium PlazaColon, Panama 49040 Phone: +507 447-1000Fax: +507 447-1111 Hotel E-mailHotel Website Classification 4 Moderate First Class Commission Rooms Rates 10% 237 - Hoteliers! Is your information accurate? Update Here Sand Diamond Hotel Location & Neighborhood Millennium Plaza.