Thanks to the ample space that the city still has to offer, Rotterdam attracts many young creative makers and thinkers. M4H, the traditional Merwe-Vierhavens port area, is home to numerous businesses. Rainmaker is one of them; they are investigating how humidity can be extracted from the air, ensuring access to water in drier times or areas. De Sponstuin of The Urbanists is another example. Here, they are experimenting with the cultivation of crops that can survive in spite of disastrous conditions like waterlogging or extreme heat. The circular Stadhavenbrouwerij, which offers guided tours, is also surprisingly innovative.