The Opera seats in the Haskell Free Library and Opera House. To the left, Canada. To the right, the US. You can be seated with your arse in each country. The stage is in Canada as are about half of the seats. The Beatles wanted to pay there once upon a time (a 400 seat venue) but issues with US Immigration prevented the show ... (I would think that if they just stayed on the Canadian side it would be no issue).