It seems that travelling around on the road is no longer the only way to go as there is plenty of room under the sea and machines such as this Aquastar AS2 two seat underwater scooter.
This is what it says it is an under water scooter for two and those gas tanks will provide enough air for around seventy minutes, which is enough to get a good undersea view of the local bay.
The scooter has two built in electric motors; one moves the machine forward, while the other handles vertical movements. This is an interesting design and there is no reason as to the riders cannot have a swim around while submerged!
Source [Tech Flesh]