Bookmark my free Interactive GPS Map for your phone:
https://andyarthur.org/ny

... shows your location as a blue dot in relationship to campsites, trails, state land. This online map requires cell service, won't work in remote country, so also bring a paper map.

Free Download of New & Historical USGS 1:24k Topograpic Maps

Interactive maps with backcountry and roadside camping: New York, Pennsylvania, West Virginia & Vermont. List of NYS DEC Lean-Tos and Firetowers.

Google Spreadsheet with Roadside, Primitive and Pay Campsites

More about South Korea...

South Korea, an East Asian nation on the southern half of the Korean Peninsula, shares one of the world’s most heavily militarized borders with North Korea. It’s equally known for its green, hilly countryside dotted with cherry trees and centuries-old Buddhist temples, plus its coastal fishing villages, sub-tropical islands and high-tech cities such as Seoul, the capital.

https://en.wikipedia.org/wiki/South_Korea