Specifically it's a structural component of the Bombay Sapphire Distillery in the United Kingdom.
...they use the excess heat from inside the distillery to be able to create a greenhouse environment outside and allow the distillery to grow tropical and Mediterranean herbs and spices directly on site. Herbs and spices that are then used in their gin products.There are actually two greenhouses:
One of the greenhouses has the environment and climate necessary to grow tropical plants and other one grows mediterranean plants, using a different climatic environment.Kudos to the designers and developers for recycling the energy and for making the project esthetically appealing.
The gardens are taken care of by a team of botanical garden experts who oversee the growth of hundreds of plants as well as herbs and spices that grow alongside the original 10 used in their recipe.