I was on
Pu luong trekking tour
http://puluongvietnam.com/pu-luong-tour-trekking/ new culinary walking tour of Strasbourg at the christening and it was fabulous. (I would take the whole cruise again just to repeat this tour.) The walking tour of Worms following the footsteps of Martin Luther was done well, but the lack of extant sites and subject matter made it less popular, as one might expect.