In 1917 a massive explosion flattened most of northern Halifax, Nova Scotia. In an attempt to convince people to move back, the replacement houses were made from hydrostone - which is fireproof. The result was one of the most beautiful "community housing projects" ever. This area is considered a National Historic Site.
History in Pieces: Searching for Remnants of the Halifax Explosion - Grownup Travels
A new and thoroughly modern city' emerged in Halifax following devastating 1917 Explosion – The Signal
Halifax Explosion - The Hydrostone, Halifax, Nova Scotia Fr…
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The world's largest pre-atomic explosion: Halifax Harbour 1917
Halifax Explosion - Wikipedia