These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Hollywood Homely: Wanda is supposed to be nerdy, frumpy and awkward, with dorky glasses and bad hair. She's also played by Kathy freakin' Ireland. Mike and 'bots got a lot of mileage in this film out of her day job.
The sequel Journey to the Center of the Earth provides examples of:
Big Lipped Alligator Moment: At one point, the main characters have several odd dream sequences. They appear to be scenes from either the movie that didn't get made (see above quote from the original director), or else scenes from abandoned character arcs (as it seems clear from viewing the movie, several actors also bailed on the movie).