During the preparation phase of Expo.02, Ralph Ammann was responsible for the coordination of planning and construction of the event infrastructure of the Arteplage Neuchâtel (event venues as well as administration and logistics areas with a restaurant) in cooperation with the technical directorate, the architects and the general contractor, for an overall construction budget of CHF 6 million.

The Arteplage Neuchâtel is designed to be a vast artificial landscape docked to the town. The theme "Nature and Artifice" is illustrated using illusion and inversion of meaning to great effect. So everything generally considered as artificial is treated as natural and vice versa.

Ralph Ammann was Head of Events Arteplage Neuchâtel and, until 2001, Manager of Logistics for the directorate events during the preparation phase of Expo.02.