Underground Cities (FRESH • Checklist)

As surface space becomes a luxury, architects are looking at the "underground advantage" for sustainability.

This is one of the world's most famous "underground cities," a 32-kilometer maze of tunnels connecting shopping malls, hotels, and metro stations. It allows residents to navigate the downtown core without ever facing the brutal Canadian winter. Underground Cities

In Saudi Arabia, the "Vault" project aims to create a vertical underground community carved into the mountains, flipping traditional urban sprawl on its head to preserve the desert surface. As surface space becomes a luxury, architects are

In Kansas City, the SubTropolis uses a reclaimed limestone mine to provide over 5 million square meters of climate-controlled business space. Why It Matters As surface space becomes a luxury