strange buildings, don't see them

What is this "street light"?

If it is a street light like a street lamp, it should be tagged as a street lamp (highway=street_lamp)

If it is a traffic light it should be tagged as signal

Camp?

highway=street_light is not a recognized tag

maybe you mean:
highway=street_lamp
or
highway=traffic_signals

Node says elevation is 1688 m but USGS topographic maps says it is 5558' -> 1694 m.

Which info is more credible?

natural=sand would be better than natural=scree for this dry riverbed

Looks like a heart on satellite imagery

Continue Pelly River