I'd paid a little extra for a harbour view when I booked the room, so I made sure to bring a miniature tripod, hoping to take some nighttime shots. Things worked out! We had an unobstructed view of Saint John Harbour and I got some long exposures. The windows weren't that clean, but, you have to do your best with what you have.
Since I started photography, I've had fun playing with long exposures. Something about using the light of a scene to create an image that does not accurately depict the scene itself... it's very fun! It's almost like you're telling a lie, but based in truth.
You have a lot less control that you normally do as a photographer, which makes it even more important to judiciously exercise the control that you do have.
Take this first shot for example. The exposure time was 20 seconds, causing the waves in the water to reflect light differently over time. That's why the water looks so bright compared to the lights; the changing reflections "add up" on the sensor and make the reflection larger and brighter than it otherwise would. But look closer on the bottom left and you'll notice something else reflected in the water, something very well-defined.
I think this is a shadow cast by one of the work lights on the crane. Because the light source is so close to the object that obstructing it, the shadow is very "hard" with defined edges. Normally, I'd expect the reflection to have its definition scattered by random waves. But over time, the waves seem to "average out" and you get a nice sharp edge. How weird! (You might think the other light sources should have defined edges too, then, but the lights themselves don't have sharp edges; the waves are averaging out to accurately depict the soft edges.)