Sun Club, Natura Park, or Riu Naiboa resorts in Punta Cana?

Naiboa is the bottom of the line of RIU Resorts. but this is still your best choice. RIU is one of the best resorts in PC. Naiboa is not on the beach, but they have a nice walk thru the Caribbean Street. If you have chance to upgrade to Riu Bamb? or Palace do it. they have excellent food and 5 star service. Riu Ta?no is also a little more expensive than Naiboa, but is on the beach.

Take the Natura Park

I would recommend the Natura Park.
This depends from your interest. If you want to have more night activities closed to you, you should select a RIU Hotel, because the Natura Park is a little far away (30-45 min taxi trip).