John A. Sibley Horticultural Center
... that Callaway Gardens promoted the John A. Sibley Horticultural Center as "one of the most advanced garden/greenhouse complexes in the world", before closing it in 2015 after more than 30 years?
... that <a href="./Callaway_Gardens" id="mwAic" rel="mw:WikiLink" title="Callaway Gardens">Callaway Gardens</a> promoted the <b id="mwAig"><a href="./John_A._Sibley_Horticultural_Center" id="mwAik" rel="mw:WikiLink" title="John A. Sibley Horticultural Center">John A. Sibley Horticultural Center</a></b> as "one of the most advanced garden/greenhouse complexes in the world", before closing it in 2015 after more than 30 years?