Nelly continues to explore Vietnam. She had the pleasure of eating in a restaurant that became famous after the recent visit of a former US president. Find out who that could be!

Lionel takes us inside the control room where locks are filled and emptied with an intricate system of drainage and supply valves. You'll learn a lot of technical vocabulary in the process!

Lionel is in the town of Grand, a Gallo-Roman city whose origin is puzzling, as there was no main source of water in the area.

Daniel Benchimol braves a chilly February day in Meudon to show us an amazing vantage point from which you can enjoy an almost complete panoramic view of Paris. If you want to look further still, you can visit the Meudon observatory, which has the third biggest telescope in the world.