Last week, I recently spent a couple of days in Adelaide on a brief business trip.
After reading about Bert Stephani's 50/50 project, where he shoots anything and everything for the next 50 days with just a 50mm lens, I decided to travel light, and just took a Canon 50D body and a Canon 50mm f/1.8 lens (I reviewed the 50mm f/1.8 lens here).

Here's a 20 second exposure out the window of my 9th floor hotel room in the middle of the city, taken well after sunset:

view from my hotel window at night

Adelaide, South Australia
Canon EOS 50D, 50mm f/1.8 @50mm, 20 sec, f/8, ISO100

Because I was travelling light, I didn't have a tripod or remote shutter release with me, so I had to make do with what I could find in my hotel room. I balanced the camera on top of a can of Coke from the mini-bar, and used the camera strap underneath the near side of the can to tilt it slightly forward, as shown in the photo below (taken with the phone on my camera).