The nation's capital. Popular things to do on a first visit: Parliament Hill, a wander along the Rideau Canal, a visit to one of many local breweries, a stroll in the Glebe to check out some independent shops, the Canadian Museum of History (/ one of several fantastic museums in the area). Popping over the (provincial) border to visit Gatineau Park is also recommended, where you can find lots of hiking trails. Chelsea and Wakefield are popular nearby towns to grab a bite to eat post-hike!
If you will be staying overnight in Perth during our wedding, make sure to stroll down the main street where there are lots of independent shops and cafes. Perth Brewery has some great beer, and Perth Chocolate Works has some equally great chocolate. Wandering along the river is a nice morning stroll, or you can be more adventurous and rent some kayaks! Make sure to also check out the Mammoth Cheese.