| Location | Toronto, ON |
| Size/Type | 2500mm & smaller RCP, RCB and horseshoe |
| Drain Type | Stormwater/CSO |
| Length | Unknown |
| Features | Large overflow tank, pumping station, drop shaft and The Fortress |
| AOTU Rating |  |
| Discovered By | Angels of the Underground |
| First Documented Exploration | Angels of the Underground |
| Notes | |
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AOTU Members present for exploration: Umbra, Phaedrus & Ignavus Friends of AOTU present: none Photographs by: Umbra & Ignavus | |
 Start PicLens SlideShow | |
Keelesdale Park has an unassuming outfall that connects to a fairly interesting RCP dropshaft, but what makes this drain really stand out is it's huge overflow tank and maze-like series of CSO connections dubbed the Fortress of Solitude. The multi-level Fortress is a junction between York trunk sewers, multiple overflow connections and the overflow pipe which flows down 3 stories to a massive storeage tank. All these attributes make for one of the most worth while visits in the GTA.
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