"More than 100 years passed in which the northern part of Guatemala was totally outside of Spanish rule, and this happened mainly because the jungle functioned as a natural border that made the arrival of the Spaniards to these places very difficult."
In 1525 Tayasal was also part of the route used by Spanish conquistador Hernan Cortes on his journey to present-day Honduras.
Most of the buildings at the Tayasal site are buried under earth and vegetation inside a seven-square-kilometer area near Lake Peten Itza.
Among partially exposed structures at the site is a 30-meter-high acropolis that according to research functioned as the residence of the ruling elite.
One of the objectives of the project is to enhance the site so tourists can better "appreciate" the vast region's Mayan archaeological value, said Jenny Barrios from Guatemala's Ministry of Culture and Sports.