Advance tickets must be bought here. Search “Castillo de San Marcos Tours” and click on “Enemy at the Gates.” Day of tickets can also be bought in person. Tours last about 40 minutes and ...

Some 30 minutes up the road from the former "World's Largest Buc-ee's," San Marcos will hold a groundbreaking ceremony for its new travel center at 2 p.m. January 29, according to a news release.