We're told the bridge was sold to an American in 1968, and it was dismantled, transported, and reconstructed in Lake Havasu, Arizona. Everyone's free to believe fairy tales, but IMHO normally functioning adults should give it up. So does this one hold up?
No, it does not.
No "9/11 Pentagon"-level photographic analysis is needed, just use your favorite search engine and look up something like "london bridge arizona construction". But before you do, what do you expect to see? Probably pictures of a bridge at different levels of completion over a body of water, right?
Wrong. What you see is a complete bridge over a desert, with dirt piled up to the top of the arches. Well WTF, huh? What are we seeing?
This was a completely existing bridge that had been buried under the desert. Probably because of erosion, at some point it became impossible to hide it's existence. So they dreamed up a tale to tell you about how it got there.
If you look around you can actually see that the waters of Havasu were originally nowhere near where the bridge is located. So between the "shore" and the "island" they had to excavate all the dirt to create a waterway, and then construct a brand new roadway to the bridgehead.
The population of Lake Havasu City, even by 1990, was only 24,000, and was not centered near the "island". No one was living on a hill out in the desert and no "bridge" was needed.
I believe they invented the whole "Spring Break" phenomenon to blow smoke around this whole incident. Culturally, that may be the strangest thought of all.
It was rebuilt/moved to be a tourist attraction, not because someone needed a bridge?
Because the story is just a big dumb joke, look at how they just sail right by that part on the wiki page:
They should have just said it was a "Brewster's Millions" thing where this guy had to blow money on the dumbest stuff imaginable. But no, they don't even have enough respect for anyone's intelligence to bother making up even the flimsiest of lies.