Built in 1770 and fortified with cannons aimed at the port entrance, Fort San Antonio was Spain's last stronghold in Chile after the War of Independence. The Spanish flag last flew here on January 19, 1826, and just 6 days later, Peru's El Callao surrendered, ending Spanish rule in South America forever. Okay, it's not much, but the site affords a sweeping ocean view, and the Hostería Ancud is next to the site if you're looking for a place for lunch.