In November last year, sculptures of three wild goats, made by Auckland artist Jeff Thomson, were installed on the Kelvin Peninsula headland, part of the Kelvin Peninsula walkway, funded by the benefactor.
Yesterday, the Queenstown Trails Trust unveiled the new piece, made by local artist Shane Woolridge.
The Missing Link comprises 25 tonnes of schist and is held in place by 2.5 tonnes of steel and concrete buried underneath.
Mr Woolridge also crafted a bench seat made from schist and Glenorchy slate.
Sitting on the bench and looking at the sculpture makes it appear complete and frames part of Walter Peak, but moving around it creates different effects.
Queenstown Lakes Mayor Vanessa van Uden said it was a special area, made more so because of the generosity of ''wonderful local people''.
''We're very lucky that we actually live in such a beautiful place and that a piece of artwork can be put here ... and embrace the environment and be part of the environment.''
Mr Woolridge said the brief for the sculpture was originally to frame Walter Peak and match its ''rugged beauty''.
Another part of the brief was to ''keep it as secret as possible''.
He said it had taken about six months to create and was transported along the track in pieces.
''To put it in a place with no access really was the test.''
Trails Trust chief executive Mandy Kennedy said she did not know what the sculpture had cost because it was ''all up to the donor''.
''We just facilitate the position.
''It's quite an amazing story - just the generosity ... it's beautiful here anyway, but when you place a piece like that, it's just stunning.''
