I was around Geneva, Switzerland, the other day and I passed by the lakeside at Versoix, where about fifty years ago a taxi jumped into the lake of Geneva with Tintin and Haddock aboard, in the
Calculus Affair. Rapidly rescued, they had to hitch-hike 8 miles to get to Nyon, where they arrived after half an hour -which sounds rather odd as there where no speed limits and very little traffic in the 50's...
On top of it, despite Tintin claimed they were in a emergency case, the local driver was strangely not very accomodating, as they still had to walk uphill to get to Topolino's cottage -this 1 mile's walk could have been fatal, because of the Bordurian agents in the Citroen car...
Our friends spend six pages' time in this Route de St-Cergue cottage (No 113 in real life), till they were rescued by the Nyon fire brigade after the explosion provoked by the same Bordurian... (By the way, some fan firemen still own and maintain the red jeep which inspired Herge!)
As one can expect, the building has been repaired (without major modification except the left-side chimney, now single and bigger); the tenants have changed and aren't specialists in ultrasonics anymore...
Nowadays, the entrance gate is no more used because there is no pavement on that side of the road to reach it on foot, and even a car couldn't go through it, as the new road is now about 1 ft higher than its threshold (the entrance is now via a small back road)...
Across the gate you can admire plenty of flowers these days, mostly roses. The right gate pillar still bears the same vase as it is in the book, but it's empty now, whereas the left pillar and vase are totally covered with a lot of green...
You can see the house
here Original link was broken, so replaced by Moderator with Google Maps link 13/10/2014