When approached with the possibility of designing an underground tunnel, most architects and urban planners avoid them all together. With an unfortunate reputation of being filled with trash and attracting crime, they are usually left with simple designs and then soon forgotten.

But a new development in Amsterdam by Dutch designers has created an underground site that welcomes rather than warding off commuters. Architects Benthem Crouwel, split between Amsterdam, in the Netherlands, and Aachen, Germany, conceived a manageable underground site called the "Cuyperspassage," or a walkable and biking friendly tunnel that connects to the IJ-River. While the 360-foot-long passage runs underneath the Amsterdam Central Station is noise-proof and well-lit, it also features an mosaic by renowned Dutch graphic designer Irma Boom.

According to Fast Company's article, lead architect Joost Vos said the most important concept was to keep safety in mind, and then let the rest of the design follow. For instance, the walkable lane is a foot higher than the biking one, so that both of these types of commuters can be safe if an accident were to occur.

Learn more about this project on Fast Company.

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