Charleston, South Carolina

Five hidden gardens and two salt-marsh accesses — private botanical collections, a rooftop catwalk over King Street, and the tidal creek locals launch from before sunrise.

Charleston has two maps. The visible one is Rainbow Row, Fort Sumter, the Battery, the Church Street carriage-tour loop. The other map lives in residents' heads: courtyard gates that open by honor system, gardens passed between neighbors for generations, a rooftop that gives you the harbor without the ferry fee. You don't find those on Google. You ask someone who has lived here long enough to be asked.

This guide is what the local field team can share — the spots with enough agreement from the caretakers to point the way. The ones we've kept out are still here. That's the point.