European circus duo The Tomansi will perform aerial ballet and trapeze on a high wire between Rydges Hotel and the Clarendon Tower, for the Adventure Festival.

The area from Cathedral Junction to the end of Worcester Boulevard, including Cathedral Square and sections of Cambridge Terrace and Montreal Street will be a pedestrian precinct for the day — the first time this has ever happened.

Heading the bill is the world’s first Jiggernaut Racing series.

Teams of four will race Britten-built rail racing machines on the tram tracks.

Competitors include Steve Gurney, John Howard, Ben Lucas and Erin Baker.

Perhaps the most spectacular event will be a high wire act by Europe’s The Tomansi, giving their only New Zealand performance.

The Adventure Playground will also include things people can try such as a giant swing and tightrope walking, and activities suitable for children.

The Adventure Cafe in the square will serve, among other things, hot chillies, wild pork, emu and ostrich.

A Telecom high tech adventure in the old Westend Theatre will help people learn to navigate their way around the world wide web.