Adventure trails guiding people around the city centre by text message are being held over half-term as part of Ways of Looking.

A project called Invisible Flock is making interactive art available beyond gallery walls, bringing together old technology, including a sea telescope; existing technology including the Bradford BBC Big Screen, and emerging technologies such as augmented reality software to change the way we perceive existing landmarks.

The software allows smartphone-users to appreciate objects and buildings in unexpected ways, viewing them through their phone handsets.

The walking routes are designed to be accessed using mobile and smartphones, with one route devised for non-mobile-phone users. Audiences are guided around by text message, phonecall, objects installed in unusual spaces and audio recordings triggered by visitors.

The four routes take in Bradford’s relationship with film and photography, its hidden architectural gems, including a secret location never usually accessed by the public, and cherished spaces including Bradford Cathedral Gardens and the Midland Hotel, where the artists have prepared some surprises for participants.

The routes are:

Visitor: A hunt for John Ruskin’s ‘lost daguerreotype’, an early photograph believed to be located somewhere in Bradford.

Words In Stone: Considering the city’s architecture and our relationship to it and drawing comparisons between Bradford and Berlin.

Look Again: Taking visitors on a ‘mysterious Victorian Gothic horror quest’, through backstreets.

The Monster: A quest to help a surgeon make a monster to protect the city from a giant spider. Designed for families and non-mobile phone-users.

Victoria Pratt from Invisible Flock said: “Ways of Looking has given us a unique chance to mine the history of the city, its relationship to film and photography, its communities, its architecture, and to weave a new set of experiences for audiences using cutting-edge technologies.”

Also over half-term, visitors are invited to dress in period costume and model for life drawing at Bradford 1 Gallery, on Thursday from 4pm to 6.30pm.

From Tuesday to Saturday, 10am to 6pm, there will be a family photography trail from Pop-Up art space, Centenary Square. Professional photographers will lead an expedition through the city centre, taking in urban photo opportunities.

For more information, visit waysoflooking.org.