The International Exhibition of Hydropower and Tourism (French: Exposition internationale de la houille blanche et du tourisme) was an exhibition which ran from May 21 to October 25, 1925, in the city of Grenoble in France, in order to promote the city as the capital of "white coal" (houille blanche), as hydropower was then known.

This exhibition gave credit to the people of Grenoble in general, and the industrialist Aristide Bergès in particular, for harnessing the driving force of water rushing down from the mountains.

Suggested by Paul Mistral, the mayor of Grenoble, the project was backed immediately by the support of Léon Perrier, president of the General Council of the Isère.

Close to the old town, land was acquired from the military, not without difficulty, and adapted in record time with lot of different buildings, as the Palais de la Houille Blanche.

Today, the only building remaining of this exhibition in the park, is the Tour Perret, closed to the public since 1960.