Supervolcanoes are usually located at volcanic hotspots rather than at plate boundaries and their main feature is a large underground magma chamber.

A paneled family room walks out on to the property's main feature, a spectacular landscaped garden with interlocking brick.

Its other main feature is its long straight beak.

What does bore us is overlong commercials before the main feature.

The main feature of the regime for unconvicted prisoners was its sheer blinding monotony.