This archaeological site is located in El Veladero National Park on a mountainside high above Acapulco,  about two miles inland from (or north of) La Costera. 

It's approximately 3.8 hectares (nearly 10 acres) in size,  at 1200-to-1300 feet above sea level.  There are a total of eighteen carved rocks in the area  -  which display important historical events,  and some myths and habits of Acapulco's earliest settlers,  the Yopes.  Palma Sola was a sacred place during the Pre-Hispanic era,  where various rituals took place and were recorded through these rock carvings and drawings  -  or petroglyphs  -  some of which are estimated to be more than 2,000 years old.

There are both Spanish and English signs which explain each petroglyph;  and it's about a 500-step climb to the top,  from where one is rewarded with fabulous views of both the city and the bay from an altitude of more than 1,000 feet.  Visitors should plan to wear loose comfortable clothing and solid footwear (not sandals),  be in general good health for the hike,  and tote along some bottled water  -  understanding that,  during the heat of the day,  this can be a strenuous activity for some. 

The site opens daily to the public between 8:00-9:00am and closes between 4:00-5:00pm.  Though some tour guides and tour companies offer  'special excursions'  to Palma Sola,  a cab ride is all it takes  -  about 25-30 minutes from the zócalo area,  for example.  Admission is free.

For a bird's-eye aerial view of the Palma Sola,  click the following link;  then expand the image (zoom out) to get a better sense of its location within the city:  Aerial Map.