Booking passage on a cargo ship is an easy and unusual way to travel.
Most of the major global shipping lines CMA-CGM, Canada Maritime, and Bank Line offer paying passengers to hop on one of their lines. As a paying passenger you are accommodated in guest cabins and have access to most areas of the ship.
Captains and crew spend a lot of time on the water, and they are usually happy to have a fresh face walking around their workplace, meaning that they may even invite you to eat with them, give you tours of the ship and maybe even have you over for an Officer's happy hour.
You'd think it would be cheap but tickets can run you more than airfare...$80-140 per day, meals & lodging included.