In the romanticized heyday of Canadian rail travel, the Roundhouse in Toronto was the largest locomotive repair facility of its kind in this country.

The lands adjacent to the immense horseshoe-shaped building are now host to a different type of mechanical beast: heavy construction equipment, chewing up land into a more welcoming locale — replete with a miniature train to wow those leaving the nearby Rogers Centre.

These are the finishing touches of compromise, the preservation of a large heritage building enabled by collaboration between the city and cautious architects. It will be part retail space, part museum, and part tourist attraction, with multiple locomotives and train cars stationed throughout the adjoining park. The project — including the Toronto Railway Heritage Centre — will wrap up this fall.