Go on a great treasure hunt in the heart of the Rhine castles! Adventurers! John Howe, the famous hero-fantasy illustrator, is waiting for you to embark on an incredible quest through the Rhine castles. Your goal: find the quartz hidden by an ancient genie, free the fantastic creatures, and open the "Gates of Time"! To start the adventure, visit www.portes-du-temps.eu/fr to discover the program, the app dedicated to the treasure hunt and the "Gates of Time" web series.