Bristol Open Doors is inviting venues, forgotten spaces and 'special places' to register to be part of the 2021 festival.
The annual event, which gives members of the public a behind-the-scenes look at the city's most interesting buildings, is set to return between September 10-12 after last year's virtual showcase.
Organisers welcome applications from all kinds of special buildings and hidden spaces, whether it's a boat, cave or bridge, from both pioneering new developments to historic sites.
They also want to hear from places of sanctuary including churches, mosques, temples and secret gardens.
This year, organisers are also inviting applications from local historians and creatives who could lead a tour and reveal a story of the city.
Anna Rutherford, Director of The Architecture Centre, organisers of Bristol Open Doors, said: "This year we’re inviting the city’s building and special places to open up and share their stories.
"Bristol Open Doors is an opportunity for us all to be tourists for the long weekend.
We’d love to hear from anyone with a space which deserves to be showcased, or from the people of Bristol about places they are curious to see inside."
This year’s festival themes range from culture and creativity, voyage and travel, to exploring the city’s regeneration and innovation.
Bristol Open Doors invites audiences to explore and learn about the city together, with over 43,000 people from all over the city attending in 2019.
More than 50 venues are expected to feature in this year's lineup.
To apply to be part of the Bristol Open Doors 2021 programme, visit the event's website. Applications close on Monday, May 31.
