This weekend, May 24 and 25, Doors Open Toronto 2008 gives you free access to a number of spaces in the city. The theme this year is Sacred Spaces, Sacred Circles, so churches and other spiritual edifices are highlighted.

All gardeners know that gardens are amongst the most sacred of earth’s spaces. Some of the garden-related opportunities are listed below. For more details, follow the link above.

• Environmental demonstrations at Allan Gardens
• A plant sale at Applewood Shaver Homestead
• The Potting Shed at Casa Loma
• The naturalized quarry garden at Don Valley Brickworks
• Tours of the green roof at Exhibition Place Horse Palace
• The new Ireland Park on the lakefront
• The private wildflower roof garden of the Robertson Building on Spadina
• Spadina House Gardens
• The “living wall” at St. Gabriel’s Passionist Parish, Canada’s greenest church
• The community garden at St. Thomas’s Anglican Church
• Guided wildflower walks at Todmorden Mills Heritage Museum
• The Indian-themed kitchen garden at Toronto Botanical Gardens
• Zen garden at Toronto Zen Centre

And while you’re at it, the gardens of St. James’ Cathedral and the labyrinth at Church of Holy Trinity are also worth a visit while you’re enjoying Open Doors visits there.