The Land is an “adventure playground,” although that term is maybe a little too reminiscent of theme parks to capture the vibe. In the U.K., such playgrounds arose and became popular in the 1940s, as a result of the efforts of Lady Marjory Allen of Hurtwood, a landscape architect and children’s advocate. Allen was disappointed by what she described in a documentary as “asphalt square” playgrounds with “a few pieces of mechanical equipment.” She wanted to design playgrounds with loose parts that kids could move around and manipulate, to create their own makeshift structures. But more important, she wanted to encourage a “free and permissive atmosphere” with as little adult supervision as possible. The idea was that kids should face what to them seem like “really dangerous risks” and then conquer them alone. That, she said, is what builds self-confidence and courage.

The playgrounds were novel, but they were in tune with the cultural expectations of London in the aftermath of World War II. Children who might grow up to fight wars were not shielded from danger; they were expected to meet it with assertiveness and even bravado. Today, these playgrounds are so out of sync with affluent and middle-class parenting norms that when I showed fellow parents back home a video of kids crouched in the dark lighting fires, the most common sentence I heard from them was “This is insane.” (Working-class parents hold at least some of the same ideals, but are generally less controlling—out of necessity, and maybe greater respect for toughness.) That might explain why there are so few adventure playgrounds left around the world, and why a newly established one, such as the Land, feels like an act of defiance.

If a 10-year-old lit a fire at an American playground, someone would call the police and the kid would be taken for counseling. At the Land, spontaneous fires are a frequent occurrence.