A long exposure of the Eiffel Tower’s sweeping light beams at night:

It’s likely not obvious, but I took this shot using Olympus’ “Live Composite” function — I love how it lets me make images like this without having to use a neutral density filter, or (diffraction-blurring) small apertures.  The full settings with an Olympus OM-D E-M5II and M.Zuiko 40-150mm lens were f/3.5, 60mm, ISO 200, exposures of 0.8 seconds each.