Take a step back in U.S. military history. Built in the late 1890s and active during three wars, Fort Flagler now features a military museum and gift shop. During summer months, take a guided tour of the gun emplacements and other facilities, or wander the batteries on your own. Fort Flagler is a popular destination for hiking, paragliding, boating, kite-flying, beach exploration, fishing, clamming and crabbing.