I don’t think we need artificial “wonders” such as this when we have such a great National Parks system.
Something like that wouldn’t replace national parks. But they could be fun, different alternatives to botanical gardens, many of which have been unchanged since the 1930s.
Seriously, kids don’t go crazy when their parents say they’re going to the botanical gardens. Heck, botanical gardens don’t get much love period unless they’re within a theme park, kind of like Busch Gardens in my part of the world.