What is it? Where is it?

[HereOnThePrimalEdge]

This is not the photo MyManao posted, but it has similar elements.

https://goodfellowbros.com/project/infan...le-course/

I haven’t discovered what the markings and/or structures are yet, but for now it does seems to be a training ground.  The circle looks like a target, but for what?  To the upper left of the circle is what appears to be a simulated village, I wish the resolution was better to determine whether the rectangles are buildings?

[HiloJulie]

If you play with the Google Earth link that I originally posted, on the top of the Google Earth Screen you should see the toolbar and several circles. Hover over the one labeled "Show Historical Imagery" and a date bar should open up. On the left, select time lapse. 

Go ahead and play with it. You can stop it and zoom in and if you click the button on the lower right corner labeled 3D you can pan and tilt the picture.

From what I can tell the original circle as MyManao posted as well as the mock "town" or whatever it is was built between in 2015. 

The area to the North that I referenced as being like some type of "runway" was built first, then the circle and mock town.

Just note that the resolution is just terrible in those years - so make sure you hover high enough - 700 to 1,000 meters. If you get a screen full of what looks like greenish clouds - hover up higher. 

At any event, in a way, I am relieved that it is most likely Military related. My first assumption when MyManao posted the picture was that it was a new Hawaii County/State DOT roundabout design mockup.

It also seemed that TomK was wanting to post a new location for us to guess. I'd say go for it.

[TomK]

I'm not ready yet, so if someone has something ready, please go ahead.

[HereOnThePrimalEdge]

Here’s one.
I’ve altered the image slightly to make it family friendly, and more difficult to reverse image search.  Please don’t.

First clue, Puna.

[TomK]

I know the answer, both Pam and I have been there, but won't give it away. A clue for others is that I really didn't want to bother going there, but she insisted.

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On a previous matter...

I stand corrected.  What's the unspeakable act for $299?  I'm tempted.

I don't know. No one speaks about it.

[Obie]

Kehena ?

[HereOnThePrimalEdge]

Not Kehena, but I think I see why you guessed it.
Here’s another hint:

   

[Obie]

I have never even heard of that or forgot but I know why TomK didn't want to go there.

[HiloJulie]

Your second hint HOTPE triggered a vague memory, but to be sure, since you did say it is in Puna, I have to ask my standard question with slight modifications:

Are (space) aliens and (UFO) landing pads and some form of a religion involved?

[HereOnThePrimalEdge]

Are (space) aliens and (UFO) landing pads and some form of a religion involved?

Aliens - of course
Landing pad - not enough room at this location, unless they are very small aliens
Religion - yes

It is also the site, or proposed site of an intergalactic or galactic embassy, variously described by different sources.  At this time, the area shows little evidence of interplanetary, interstellar, galactic, or intergalactic visitors, much less local Hawaii yard maintenance workers.