It looks like any old roller coaster, with curves and heart-stopping loops. But instead of zooming by, people are walking—on inclines fitted with steps. This creation in Germany's Rhine Valley is an ...

Rich wine nerds have a wine cellar. Very, very rich wine nerds install a door in their kitchen floor leading to a spiral staircase surrounded by wine, which is the coolest wine cellar ever. In ...

Zoning regulations restricted the site to one story, so the designers made the most of it by including a basement for additional storage and reaching up to the roof for extra entertaining space. A ...

Spiral staircases save valuable square meters because they occupy a much smaller area than a conventional staircase. With daring shapes and diverse configurations, they can also be iconic objects in ...