On December 6, 1983 the park was added to the list of World Heritage Sites, a status shared with the Great Wall of China and the pyramids in Egypt. Only 12 national park areas in the United States are considered World Heritage Sites.
Visiting
The site is open to visitors year-round.
June - November: 9:00 am - 5:00 pm
December - May: 9:00 am - 6:00 pm
El Cañuelo
There is a fee for entering the forts at the site ranging from US$3 for adult access to one fort for 1-day to US$5 for adult access to all forts for up to 7-days.