1. The Cusco Historic Center, also known as Centro Historico de Cusco, is the heart of the city of Cusco, located in the Peruvian Andes. The center features a combination of Inca and colonial architecture, with both pre-Columbian and Spanish influences. It was declared a UNESCO World Heritage Site in 1983. Some of the most notable attractions in the center include the Plaza de Armas, the Cathedral of Santo Domingo, and the Qorikancha Temple.

2. The Cusco Historic Center is open 24/7 as it is a public area. However, specific attractions such as the Cathedral and Qorikancha have set hours of operation. The contact number for tourist information is +51 84 223722.

3. There is no fee to enter the Cusco Historic Center as it is an open public area. However, some attractions such as the Cathedral and Qorikancha do charge admission fees. Many of the attractions in the center can be reached on foot, but taxis and public transportation are also available for those who prefer not to walk.