I barely remember part of one dream from last night, which took place in a small fictional city with a waterway/canal that went down the center of the entire city, and all the buildings were built on side of the waterway/canal near concrete-like walkways/docks/tunnels/buildings/alleyways/et cetera that allowed you to move around the city; and so everything was connected.
I was mostly in covered areas that were like being under a bridge with water or underground in a concrete-like sewer, and I guess one of these areas had a small security/police building for the people doing boat patrols.
The city always had at least one person/police officer/security officer/whoever on a boat patrolling the waterway/canal at all times, this person or persons was/were there to secure the city and police the city when necessary, and so this was an important job.
I can not remember most of the dream so it is very unclear and it does not make much sense, it took place during a modern or slightly futuristic time period, but Spartacus from the Starz TV series Spartacus was there oddly; and I was there along with some other people.
I was probably in the dream exploring, shopping, and/or being trained to be a security guard for the city patrolling in a boat; and at some point something probably happened with Spartacus and his people entering the city, and so the police/security/government/whoever were after them.
At some point I probably came across them sneaking through tunnels/alleyways, I guess I was sympathetic to their cause, and so I tried to help them avoid getting arrested; and I probably used my boat to help them, but that is all that I can remember.