ST. AUGUSTINE, Fla. -

TripAdvisor, the world's largest travel website, has named St. Augustine's Castillo de San Marcos among the nation's top landmarks.

It was ranked 25th on the list.

The Travelers' Choice Attractions awards were determined based on the millions of reviews and opinions from travelers. Award winners were selected using an algorithm that took into account the quantity and quality of reviews for landmarks worldwide, gathered during a year-long period.

Gettysburg National Military Park topped the list.

Also near the top were the Golden Gate Bridge and Alcatraz.

For the complete list of winners from the 2014 Travelers' Choice Attractions, as well as reviews and candid traveler photos, go to www.tripadvisor.com/TravelersChoice-Attractions.