The landscape in my neighbourhood is dotted with ancient artefacts dating back to the Iron Age or older. There are hundreds of burial mounds, some of them very prominent in the landscape if they have survived the razing vandalism done in the last century. Here is a nice example, around 1500 years old, situated smack in the middle of the school yard of the local primary school. The developers had planned for the mound to be razed -- of course -- but their designs were overthrown. Instead the new school got its name from the mound ('Haugtun' == ' [burial] mound in the [farm, school] yard') and the pupils might see something different and older than their IPads (perhaps).
Nikkor 50mm f/1.8 S-Line Z lens on my PrimaLuce Z5, IR though the Hoya R720 filter. Undoubtedly this lens is an excellent performer also for IR, at least as far as sharpness is concerned.