Niagara Falls—Niagara-on-the-Lake is another close LPC-CPC race that could use any help from non-LPC voters. It used to be a CPC seat.
This page shows a nice visualization of the closest races.
The Conservative candidate has a 99% chance of winning in my riding. Thankfully voting only took 10 minutes out of my day so, while it feels useless, at least it's quick and painless!