Thirty minutes from Savannah, on Cockspur Island at the mouth of the Savannah River, sits a brick fort that changed military history in the space of 36 hours. Fort Pulaski, completed in 1847, was seized by Confederate militia just before the Civil War began. In April 1862, Union forces bombarded it with new rifled cannons that its defenders had no answer for — and the garrison surrendered in a day and a half. The battle proved that old-style brick fortifications were finished, and the holes those shells punched in the walls are still visible today.

Because the army left the site in the 1870s and it was never modernised, much of the fort survives as it was. Now a National Monument covering 5,623 acres, it's run by the National Park Service and packed with original features: authentic cannons scattered across the parade grounds, soldier quarters, offices, and artillery casemates. Guided tours cover the lower level in about half an hour, and daily Ranger Talks at 11 a.m. field questions about the fort and its surroundings. Prefer to wander alone? Grab a self-guided brochure at the Visitor Center.

The wider park rewards more time. Three marked trails stand out: the 1.7-mile Lighthouse Overlook Trail, with views of the Cockspur Island Lighthouse; the mile-long North Pier Trail, which passes Battery Hambright, an early-1900s battery whose guns were never even installed; and the two-mile Historic Dike System, threading through tide-control works designed by a young Lt. Robert E. Lee. Birdwatchers regularly spot bald eagles and otters, and the grounds also hold a workers' village cemetery, old cisterns and a 20th-century quarantine station.

Water people are well served too. With a Georgia fishing license, you can cast from the base of Cockspur Island Bridge (not from the bridge itself during park hours), the West End Fishing Area, or Lazaretto Creek Pier — the Savannah River yields herring, sea bass and perch. Kayaks and small boats launch year-round from Lazaretto Creek, giving you a different angle on the fort from the water.

Practicalities are simple: entry is $10 per person, or $35 for an annual pass, with parking, fort access and trails all included. The park opens 9 a.m. to 5 p.m. daily, with the fort closing half an hour earlier. There's no public transport, so you'll need a car — which makes it easy to fold into a coastal Georgia loop with underrated Tybee Island just down the road.

For history buffs, this is a rare chance to walk through a largely untouched Civil War site rather than a reconstruction. For everyone else, it's a cheap, scenic half-day from Savannah combining a short fort visit, easy trails and a paddle — no battlefield expertise required.