{"4h":"ATL is massive and connecting between concourses requires security rechecks on many routes, so stay airside. If you're in Concourse F, you're in luck—the Delta Sky Club near F10 (mezzanine level) has showers and a solid 4.3 rating, perfect for freshening up without the terminal shuffle. Concourse A and the immediate A-B-C cluster are your quietest zones for a quick rest. Grab food at the various chains scattered through your concourse rather than attempting major terminal exploration. The Minute Suites in Concourse F (between F2-F4) offer private rooms with showers if you have 90+ minutes and want genuine sleep, though it's pricey. Skip trying to leave the airport entirely—security rechecks between most concourses take longer than you'd think, and you'll stress yourself getting back. If you're connecting through E or F to another terminal, expect at least 75-90 minutes of walking, security, and potential immigration queues. Your best move is finding a decent lounge, showering, eating something fresh, and power-napping in a quiet corner of your concourse.","8h":"You can safely leave ATL with 8 hours, but timing is tight and you need to be strategic. MARTA (the train system) connects the airport directly to downtown Atlanta—it's cheap ($2.70 one-way), takes about 20 minutes, and beats rental cars or rideshares for reliability. However, getting back through security and to your gate typically takes 60-90 minutes depending on your departure airline and concourse. This leaves roughly 5-6 hours maximum in the city. Head downtown to the Georgia Aquarium or World of Coca-Cola (both walkable from Peach Street MARTA station) if you want a quick immersive activity, or explore the Beltline, a trendy converted rail trail with food spots and parks. Eat at Goro Ramen in Little Five Points or grab pho in the Vietnamese district. The main challenge: ATL traffic is unpredictable, and MARTA can have delays. Getting daylight exposure helps with jetlag if you're traveling west from Europe or east from Asia. Return to the airport by your airline's recommended time—international connections here run tight. Consider the Delta Sky Club (Concourse F) as a buffer to relax before departure.","24h":"With a full day, explore Atlanta properly without rushing. Arrive early afternoon, take MARTA downtown ($2.70), and check into a mid-range hotel in Midtown or Virginia Highland—both are 15-20 minutes from the airport and walkable for evening exploration. Afternoon: spend 2-3 hours at the Georgia Aquarium or High Museum of Art, then grab lunch at Bread & Butterfly or Local Three in Inman Park. Evening: walk the BeltLine trail near Eastside, catch sunset from Piedmont Park, and eat dinner at one of the neighborhood spots like Home Grown or Antico Pizza. Sleep 7-8 hours (crucial for jetlag recovery) and aim for natural morning light to reset your circadian rhythm. Next morning, grab coffee at Condor Chocolate or Hop City, walk through Little Five Points' eclectic shops, then have brunch at The Optimist or Maple Drive. Head to the airport by early afternoon via MARTA or Uber (rideshare runs $15-25). This schedule gets you proper sleep, daylight exposure (especially helpful if you're heading east to Europe), and genuine downtime rather than just airport resting. The airport's spa facilities at The Chiroport or XpresSpa can top off your refresh before your next flight."}