I do not know what it is, but Sansevieria leaves tend on average to be stiff and not that floppy and curly. Also those two plants you link to look pretty shiny to me, way shinier than the plant in the OP. The photo in the OP does not scream Sansevieria to me, also I come across plenty of bromeliad photos that are of plants that are not shiny leaved, that at least in terms of rosette and posture resemble the plant in the OP.
To ask the botanical garden was the first thing I did, but unfortunately I got no help. They said that they would help, and I sent them my photos , but after 7 months (!) and several unsuccessful requests I gave up.
@Iochroma and tofitropic:
After comparing many images, I also believe that the plant on my photo is one of the genus Vriesea ospinae.
@tom65719 Boooo! I am very disappointed. What kind of botanical garden is that? I wonder if the gardeners know what their front desk staff is saying.
(or, I suppose, realistically, they're probably ridiculously understaffed)