Complete guide to Castillo de San Marcos National Monument in St. Augustine, Florida including things to do, history, pa ...

President Coolidge created Castillo de San Marcos National Monument in 1924. When visiting: Off State Road A1A in downtown St. Augustine at 1 S. Castillo Drive. Visitor information: (904) 829-6506.

As the National Park Service celebrates its 100th anniversary this week, St. Augustine's Castillo de San Marcos is being recognized for its place among America's most important historic buildings.

Castillo entrance will be FREE for all visitors on October 2. Castillo de San Marcos is open 9:00 a.m. - 5:00 p.m. [SIGN UP: Action News Jax Daily Headlines Newsletter] ...

• The entrance fee for the Castillo de San Marcos is $15 for adults (16+ years of age). Visitors 15 years of age and under enter free with an adult.