[Snickering Hound]

Uhh, there have been Duck tours in Arkansas using WWII surplus amphibious trucks for decades...

[Pharmboy]

True...those Ducks have been around, but theirs is a bit sharper looking...

[Knute]

No picture to illustrate the comment.
The Wisconsin Dells have had their land/water tours as long back as I can remember. Upper & Lower versions, above & below the dam.

I rode in an Amphicar that a coworker owned about 12 years ago. What a trip!