About Forest of Imagination from their website:

Forest of Imagination is a four-day playful and contemporary arts event and creative learning programme - free for everyone of all ages.

Each year, Forest of Imagination transforms spaces around Bath into a fantastical pop-up forest and outdoor gallery by a collective of local and international artists and creative professionals during a free, four-day contemporary arts event.

Forest of Imagination features a playful programme of sensory installations, artworks, outdoor theatre and participatory creative activities for visitors of all ages. 

Forest of Imagination is the brainchild of a collaborative team of Bath-based businesses, including landscape architects Grant Associates, arts-based charity 5x5x5=creativity, creative consultancy Imaginnovation and architects Feilden Clegg Bradley Studios. It aims to highlight the inherent creativity of Bath and connect people with nature by reinventing spaces in the city to inspire intuitive play, unleash imagination and encourage exploration.