Atlas Obscura catalogs the most unusual, surprising, and amazing places around the world, thanks to the discoveries shared by our intrepid community of travelers and explorers. There are now more than a thousand incredible hidden wonders listed in the Mid-Atlantic U.S., and we’ve plotted each and every one of them on this interactive map.

The possibilities are vast, from the abandoned City Hall subway station to the fluorescent rocks of Sterling Hill Mine, to the “Steampunk Tree House,” to Philadelphia’s Magic Gardens and hundreds of other architectural oddities, natural wonders, catacombs and crypts, and unique collections across the region.

Start exploring, and see what rabbit holes you may stumble down. And if you know of an incredible place that we missed, you can add it to Atlas Obscura here!