Before you close the question, take a look at the killer whale submarine :).
I would buy one but I do not have $100,000. So is there a place in the world to rent one of those for one hour or so?
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You could try to ask the "Killer whale submarine" (aka Seabreacher) dealers close to your place / the region where you'd like to rent it.
This page lists dealers over the world.
Can I rent one? Not at this stage, but many of our customers have expressed interest in starting Seabreacher rental operations, so there may be a Seabreacher rental facility near you in the upcoming future.