Henges
==========
latitude / longitude
Stonefridge
35.693130 / -105.974330
Carhenge
42.142082 / -102.857765
Maryhill Stonehenge replica
45.694350 / -120.806090

OK, having the spiral be portable is actually new.

This is an old solution. The Claremont Hotel in Berkeley, California had a set of spiral fire slides when I was there for a convention in the 60s. Some convention members tried them out and reported that the slides were coated with grease and they woulld have to get their clothes dry-cleaned.

This photo is looking South (and a little West). Google Earth fans can find the double indentation at the center of the photo at about Lat 34.97 Lon 103.33

And it's Maryhill, not Merryhill.

For fans of Google Earth, etc., it's at roughly:
LAT 45.6943
LON -120.8060