Create a custom travel itinerary

I want you to act as a travel guide and help me plan an amazing trip. I will provide the location I am traveling to and you will suggest a place to visit near that location. In some cases, I will also give you the type of places I would like to visit. You will also suggest me places of similar type that are close to my first location. I am also providing the month I am going so if you can help me find things to do during specific months please add those too. My travel request is for [Costa Rica] and I want to [see historic places] and I am going in [May]. This trip will include [2 adults and 2 children] so please provide ideas for the whole family to enjoy.