The ancient city of Mahendraparvata has been hidden in the mountain forests of Cambodia for centuries, but thanks to airborne lasers we now have a detailed map of it
Source:
https://www.newscientist.com/article/2219661-ancient-jungle-capital-of-the-khmer-empire-mapped-for-the-first-time/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home