A bog in the heart of the city? Mer Bleue is Ottawa's best secret hike.
(Two important things to keep in mind: You should never leave the boardwalk as the surrounding eco-system is too fragile to survive hikers. And don't be alarmed if the boardwalk sways or moves a little bit- it's designed with some flexibility to move with the soft earth and to float on flooded areas.)
I hope you'll be following in my footsteps soon!