Don't know if this has been posted on this thread. But I first noticed this foundation on my last trip to Niagara in Sept. It was boarded up in sections so I knew this hadn't been touched in a while. So I googled it and read the interesting story behind it.

Mike DiBattista/Niagara Falls Review/Postmedia Network
"The structure at 6609 Stanley Ave. has been an eyesore in the Fallsview area since the early 2000s"
"was to be an elegant 30-storey Crowne Plaza hotel"
"But a tough global economy resulting from the 9/11 terrorist attacks and a decline in tourists visiting Niagara Falls meant the company couldn't get the financial backing it needed to get the project finished. Construction was stopped in 2004 and never resumed."
"Although there's no set asking price, the property owners have invested more than $20 million so far."
"there are four recommended options for future owners: Finish the existing approved plan of a 30-storey, 300-room hotel; build a 40-storey hotel (which the foundation was built to handle); build a combined condominium/hotel (265 condos on 25 floors and 156 hotel rooms on 12 floors); or build a 30-storey condominium tower (250-325 units depending on their size)."
If you look at the google maps and swing around to the other side of the street, you can see why this looks so out of place in this condition.
https://goo.gl/maps/G4za92j74Kt