Doors Open Ontario

While this site has participated in Doors Open Ontario in the past, it is not part of the current season’s program. Please check the Home page for this year’s events and participating sites.

Petrolia Discovery Doors Open Lambton County

Petrolia Discovery

Visit Petrolia Discovery and experience the Fitzgerald Rig. This mechanical marvel is still the largest pumping rig in the world, operating continuously for over a century. Initially powered by steam, it later used an internal combustion engine and, finally, an electric motor. The rig takes its name from the man who erected it – Frederick Ardell Fitzgerald – Imperial Oil’s first president.

Tell us your story about this site

  • Guided tours available
  • Parking

Contact info

4281 Discovery Line
Petrolia, Ontario


Year built: 1903
Architect: Frederick Ardell Fitzgerald

Dates/hours open

Saturday September 28, 2019
Saturday: 10 a.m. to 4 p.m.

Petrolia Discovery 4281 Discovery Line