Woodland Trust Nature Detectives

If you need a little inspiration for getting out in nature, Woodland Trust’s Nature Detectives website is awesome! They have all sorts of activities and printable scavenger hunts arranged by age, and they have lots of inspiration and ideas on their blog. The only downside is that it’s specifically for Great Britain, so lots of the scavenger hunts aren’t applicable here in the U.S. I’m on the lookout for a website with similar resources for the U.S. Anybody know of one?