I recently bought a 60mm resin base from Scibor Miniatures -- a European company that makes many, and fine resin miniatures (as well as bases) that are suitable for many types of war game settings.
I've bought from them before in the form of some bodies to be used as Grey Knight characters and was very pleased with them (they're available through their website, but also in a number of specialist stores that I've visited in the past - both in Australia and the UK). So I thought that I would purchase some more parts, but this time with a view to making a base - or rather saving me some time in base making - for a new dreadnought that I have in mind.
This particular base is the 60mm version of their ruins range. It features a number of interesting details that include the patterned gothic church interior style, a cracked tombstone (bottom right), a circular cracked base that might otherwise be used for a 25mm base (upper left), as well as other details such as a skeleton with a complete head of hair (left), leaves (lower left) and dirt (right) covering the rest of the ground.
I'm very pleased with this base since there's zero cleanup work to do and its pretty much good to go right out of the box!