Kaulana Manu Nature Trail used to be known as Kipuka 21. A kipuka is an area of land that has been surrounded by lava and the 21 referred to the fact that this one was located at the 21 mile marker of the road across the middle of the island.
It has been renamed Kaulana Manu Nature Trail, presumably to reflect its new grandeur since the trail has been renovated, which is a good thing. However, a new toilet facility and parking lot, featuring space for three large buses, has also been built, which is not necessarily a good thing.
The trail is a one mile loop through a fragile environment, where native endangered birds can sometimes be seen. I’m not clear on how disgorging busloads of people into this area is going to help preserve things. If three buses did arrive, there would be gridlock on the trail, which is narrow and winding.
Fortunately, when I’ve visited, the place has been pretty much deserted. Long may that continue.