Pedro St. James Castle is the oldest structure on Grand Cayman, and is a part of the history of the island.  It was the building where they designed the laws for self-governance and where they announced the abolition of slavery on the island.  The property has a beautiful view of the coast.  The house is well-designed - even without air conditioning, it's cool and comfortable.  One reason is that there are louvered walls, which allow the air to flow freely, but can be shut against the weather.