Daniel Charbonnier, co-founder of Minds in Motion, an international hospitality advisory and services company, has recently partnered with Frank and Patrik Riklin to transform an old bunker that shows us just that -- a no-frills, zero-star hotel.

The "Zero Star Hotel," an art installation, housed in a Swiss nuclear bunker converted into an eco-luxury hotel hosts 14 guests in a configuration of six single beds and four double beds. Larger groups can also be accommodated in an adjacent room highlighting original military-style bunk-beds.