You're not seeing things: the plate glass window of the Cowshed Spa in Virgin's Upper Class lounge at Gatwick has been carefully cut to showcase - yes! - a massive boulder. Now, whether trading in Virgin Airmiles or travelling Swanky Class for business (at someone else's expense!), we've always found that Virgin's spas at their UK terminals are among the very best business travel bonuses. Think: free shoulder massages, manicures or pedicures, with longer treatments for a relatively modest sum - and all using Cowshed's excellent range, as developed at their original spa at Babington House. (Best to book treatments in advance of travel, though, to avoid disappointment.)
Wilma Flintstone would feel right at home. (And so, actually, do we!)