Heartman's Lab is a building overlooking a heart-shaped lake that once was a city housing Heartman and his family.
Heartman's Lab is one of the special facilities you can find in the Central Region of America, and where one of the main characters of Death Stranding makes his home. The scientist known as Heartman has made his home at the edge of a heart-shaped lake deep in the mountains to the Southeast of Mountain Knot City, and just to the West of the Roboticist, but has even installed a hot spring at the top of his stylish lab.