Nestled in the forest on the shore of Meech Lake, the ruins have a unique history. This beautiful, industrial heritage site is extremely popular with photographers.

Visiting the ruins

In summer

The ruins are accessible on foot or by mountain bike. Take Trail 36 from parking lot P11 (3.25-km round trip).

In winter

The ruins are accessible on snowshoes, skis and by snow bike.

  • On snowshoes, skis and by snow bike : Take trails 45 and 44 from parking lot P16 (12.2-km round trip).
  • On skis: Take trails 36 (classic) and 36B (back-country) from parking lot P11 (3.25-km round trip).

Help us preserve the Park’s heritage landscapes.


Washrooms: Washrooms are available at P11.

Parking: A parking lot is available at O'Brien Beach (P11), on Chemin du Lac-Meech in Chelsea. Vehicle parking charges apply at certain times of the year.

Picnic tables: O'Brien Beach has a picnic area.

About the ruins

Located in a deciduous forest near Meech Lake, the ruins are the last remaining traces of a fertilizer plant constructed by little-known inventor Thomas Leopold Willson. The complex originally included three buildings: an acid condensation tower, a dam and a generating station. Unfortunately, the ruins were never preserved. The tower was destroyed by fire and, today, only its foundation remains. The dam and plant, its gaping windows still visible, stand near the cascading falls as a reminder of a rich and innovative company — and a glimpse of our scientific history.


Thomas Leopold Willson

While frequent visitors to Gatineau Park may be familiar with the Carbide Willson ruins, the history of the man behind the buildings may remain a mystery to them. Born in 1860 in Woodstock, Ontario, Thomas Leopold “Carbide” Willson was a pioneer of the North American electrochemical industry, with over 70 patents in his name.

The inventor’s fame and his nickname “Carbide” come primarily from his discovery in 1892, while he was working in the United States, of a calcium carbide manufacturing process. As is often the case, this discovery resulted from a series of fortunate accidents.

In 1907, Willson purchased 460 acres of land at Meech Lake for his summer home. He used the site to advance his research on nitrogen. Four years later, he built a dam, a generating station and an acid condensation tower near his home, at Meech Creek, on the shore of Meech Lake. The entire complex formed a superphosphate (monocalcium phosphate) fertilizer plant. Unfortunately, in 1915, while in New York City trying to raise new venture capital, Willson collapsed in the middle of the street, struck down by a heart attack.


The former summer home, now called the Willson House, was bought and sold several times, until dentist Joseph Gilhouly sold it to the National Capital Commission in 1979. The Government of Canada uses it now as a conference centre. The ruins of the former mill, part of the power station and the base of the acid condensation tower that survived the fire are all that remain of the plant.

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