My dad made it a point to take us to see things like this. But I have never heard of these. We have tramped the hills in several western states and I’ve seen some pretty cool things not many people get to see. Cool to me that is. I would like to see this, probably cause chances are I will never go to Nazca.
My dad (at one time a Scout Master) did the same with us, too; and I've carried it on ever since. Fortunately, my wife loves doing it, too.
Caves; petroglyphs; pictographs; Indian burial mounds; Oregon Trail & other pioneer burial sites; exposed fossils; 'hidden' waterfalls; old mines...but only looked & poked around OUTSIDE!
Also, slightly more marked stuff, such as remote Civil War rifle pits; old fort sites; remote ghost towns & ruins; active archaeology sites; the Spiral Jetty; almost forgotten 'roadside attractions' bypassed by the previous highway, let alone the newest one.
That doesn't count the usual stuff, like museums; Andersonville, Fort Laramie or The Alamo; Cape Canaveral; state & national monuments, parks, etc.
Stay off Interstates as much as possible, and always carry hiking shoes & supplies...never know what you'll find that needs a closer look.
For that matter, I'm still trying to (no hurry) trace down some of the history on one of our parcels on the ranch. Remains of a 3 or 4 room collapsed log house; fallen in dug-out stable & maybe root cellar behind it; what is almost certainly a rock mounded grave. A garden site, parking/garage site; a road up the creek bed to reach it, including hand stacked rock retaining wall to hold fill for the road; old car parts strewn around. Looks like it was abandoned during or before the Great Depression. None of the old timers seem able to remember anybody ever living back there. About 1/2 mile downstream, onto Forest Service land, there are also old cement foundations.