I'm looking at Google Earth while writing this.
In the Lifestyles area is Ocean World, Casino and Yatch marina.
Puerto Plata has some attractions but that would take a day learning the city.
East of Puerto Plata is the Playa Dorada complex and golf Club.
Not much until you get to POP airport that he should know where it is.
Sosua is next with two casinos but not vary many high end hotels.
(OH.... I live just outside of Sosua. I'd be glad to show Pedro around our little town.)
Monkey Jungle is up.. up.. up El Cocho road and the ride is bumpy.
Monkey Jungle Dominicana | Benefits Projects in Dominican Republic & Haiti The place is much better then the website. Pedro may not want to drive all the way up but he should know about it.
East of Sosua is Sea Horse Ranch. I've given you some info about them before.
Caberete is the next town.
I'm sure that others will have better knowledge of this in their areas.