Jingle in the Jungle

Molly and Grainne are traveling with her parents, magazine travel writers, through Mexico. At one of their first stops, Grainne finds a mysterious notebook with directions to a hidden treasure...diamonds. The only problem is, the first page is missing. That was the page that told the location where the diamonds were buried.
They go on the search of a lifetime. Search with them and see if you can figure out where the diamonds are buried