Puerto López is one of the more established cities along the Ruta del Sol and is popular mainly for its close proximity to Isla de la Plata and the Parque Machililla. Although it is one of the cheapest spots to buy tours to Isla de la Plata, to go whale watching and to enter the Parque Machililla, Puerto López is not a great destination of itself. Its a dull, dusty town with just a handful of decent restaurants, bars and hotels. The beach is not nearly as inviting as nearby beaches, like Los Frailes to the north. However, you will probably find it necessary to stay at least one night in Puerto López.
More info on the city: www.puertolopez.net