The "Tree Cathedral" is a unique outdoor structure located in Middlesex, England. Designed by artist David Nash, it features a series of living trees arranged to create a cathedral-like space. The trees are planted in a way that mimics the architecture of traditional cathedrals, with tall trunks representing columns and branches forming a canopy overhead. This installation serves as both an art piece and a natural sanctuary, encouraging visitors to connect with nature. The Tree Cathedral is part of a larger movement that emphasizes the importance of environmental art and the relationship between humans and the natural world.