The day I was having troubles with the website happened to be Hubble’s birthday April 24th. The Hubble site put out a collection of colliding galaxies.
They have a poster page (you can find it here) and another page (located here) with each of the galaxies separately imaged complete with a caption if you click on the provided link and you can get multiple sized images.
The image (click it for a larger version) and caption below is one of my favorites, probably because I’ve seen it. Anyway, check them all out see which you like best.

NGC 5331 is a pair of interacting galaxies beginning to hold their arms . There is a blue trail which appears in the image flowing to the right of the system. NGC 5331 is very bright in the infrared, with about a hundred billion times the luminosity of the Sun. It is located in the constellation Virgo, the Maiden, about 450 million light-years away from Earth.
This image is part of a large collection of 59 images of merging galaxies taken by the Hubble Space Telescope and released on the occasion of its 18th anniversary on 24th April 2008.
Object Names: NGC 5331, VV 253, KPG 401
Credit: NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University)