Hey Kanadafan.....
sorry, I don't wanna be a penny-pincher but what I described is on the Canadian side.
I just gave it the wrong name.
Its called 'journey behind the falls' and is located
at the table rock.
For those who want to read about it follow the Wikipedia link about 'table rock'.
http://en.wikipedia.org/wiki/Table_Rock,_Niagara_Falls It's quiet a historic name.
The following is the official description about 'Journey behind the falls':
Observe the thundering power of the Falls. This year-round attraction affords thrilling views of the Falls from below and behind. Visitors descend 150 ft. by elevator, where a short tunnel (150 ft.) gives access to two outdoor observation decks and two portals located directly behind the Falls.I have never seen the falls from the US side and have to say that I have actually no interest in it since the scale of this world wonder can really just be seen from the Canadian side.
Sorry to the Americans but on this
we are more privileged

.
Marc