City of the Ancients

Nested hint: How do I get into the towers with three doors?
(sorry, cannot decode section)
Nested hint: How do I open the door in the southwest corner of the city?
(sorry, cannot decode section)
Nested hint: How do I open the eight doors in the museum?
(sorry, cannot decode section)
Nested hint: How can I get into the building in the center of the city?
(sorry, cannot decode section)
Nested hint: How do I get out of this city?
(sorry, cannot decode section)