This and your other recent picture look like they are are not Agave americana, which has pretty vicious spines.
I am thinking maybe this could be a Furcraea, maybe F. foetida, which would be mostly spineless along leaf margins.
I'm not 100% sure here, but that's as far as I got with an ID. Maybe @mcvansoest
would know more.
Please let me know what you think. Maybe you recall or captured some signage from the bot garden?