A hidden tunnel which is normally off limits will be open for an “enchanting” display of light and sound.

The Cab Road Tunnel, which runs under Brighton Station, will be open for the show as part of The Dreamy Place festival, which is coming to the city next month.

The event provides a rare opportunity to visit the 80-metre tunnel and is free, with no booking required.

Organisers said the tunnel, originally built for horse drawn taxis to take passengers to and from the station platforms, will be transformed with strobing lights and immersive sound.

The show is called Ammonite and the creators said the static structure of the tunnel “uses light to give the illusion of organic movement and echoes the natural architecture of a prehistoric shell”.

Other events include an interactive exhibition at Gallery Lock In in Little Western Street and an evening of talks at Nile House in Nile Street.

There will be an interactive exhibition at Gallery Lock In in Little Western Street, BrightonThere will be an interactive exhibition at Gallery Lock In in Little Western Street, Brighton (Image: Bethan Troakes) READ MORE: Work on project to regenerate city street to start soon

The festival first comes to Crawley from October 4 to 6 and there will be pyramid light sculptures illuminating Queen’s Square and interactive holograms at the town’s bandstand.

It will then come to Brighton from October 25 to 27.

The majority of events in both places are free.

These pyramid light sculptures will illuminate Crawley's Queen's SquareThese pyramid light sculptures will illuminate Crawley's Queen's Square (Image: Sean Pollock)

“We’ll be transforming familiar spaces and lighting up hidden places,” said Jamie Wyld, director of Videoclub, the organisation that has produced the festival.

“Dreamy Place is all about collective experiences and encouraging people to think about how new creative technologies can arouse curiosity and spark creativity.”

Lexi Zelda Stevens, guest curator for Dreamy Place 2024, said: “Many of the artworks in this year’s festival connect the ancient past with the future through playful use of cutting-edge technology.

"The artists’ interests span the contemplation and celebration of light in ancient civilisations, to magic, witchcraft and collaboration."

In Brighton, there will also be shipping containers in Jubilee Square housing installations, collages and AI technology. The work shows how photographic images are produced, distributed and consumed.

At Hove Museum, there will also be the chance for families to experiment with film and digital media.