Abo Elementary School had a concrete slab roof that doubled as the school's playground.
Sources
- Abo Elementary School (en.wikipedia.org)
- https://www.nps.gov/places/abo_school-nm.htm (nps.gov)
- https://virtualglobetrotting.com/map/abo-elementary-school-located-entirely-underground/view/google/ (virtualglobetrotting.com)
- https://maps.roadtrippers.com/us/artesia-nm/points-of-interest/abo-elementary-school-and-fallout-shelter-artesia (maps.roadtrippers.com)
- https://wikimapia.org/18362/Abo-Elementary-School-The-Underground-School (wikimapia.org)
- http://atomic-skies.blogspot.com/2013/07/the-abo-school.html (atomic-skies.blogspot.com)
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