Warrnambool, Victoria, Australia is located on the southeastern coast of the country. The nearest volcanoes to Warrnambool are extinct, meaning they haven't erupted in thousands of years.

The closest volcanic formations are:

* Mount Gambier: This large volcanic caldera is located in South Australia, approximately 230 km (143 miles) northeast of Warrnambool. It's the largest maar (explosion crater) in the world and has many interesting features like the Blue Lake, a crater lake that turns from grey to blue every year.

* Mount Schank: Another maar volcano, Mount Schank is also located in South Australia, approximately 240 km (150 miles) northeast of Warrnambool.

While these are the closest volcanoes, it's important to note that they are not considered active and haven't erupted in thousands of years.