While Kutna Hora is widely advertised in Prague as a half day trip, the place deserves more time than this. I took a morning train to Kutna Hora Hlavni nadrazi, which is about 10 minutes walk from the bone church. Entry to the bone church could be purchased with a combination ticket for other churches in the town. It is fairly easy to get into town from this church, take the half hourly bus to the town centre for 12 crown. I had time to visit the other churches on my ticket, though skipped the Jesuit college. The bone church was by far the most unusual of the the three main churches.
I had reserved a place on both tours of the silver mine prior to arriving. The main tour, down the mine was fantastic, and despite me being rather large in size, I managed to squeeze through the tunnels. Be warned though, if you are, or think you might be, claustrophobic, then this will test you to the limit. Once in the mine, you either stick with it to the very end, or backtrack up 160 steps to the surface. Do spare a thought for the guide though as one has to escort you back up the steps if you decide to leave early. Additionally, since access to the mine dates back to the communist period, some aspects havent aged very well, though it did add something to the uniqueness of the tour. That being said, the museum staff did their utmost to ensure everyone remained as safe as possible and were not put in danger. They even provided secure storage facilities for your backpacks, which was advantageous as space in the mine could be extremely limited.
Having sampled the mine first hand, I found the second tour, covering the history of mining and the castle, very interesting. While it was comparatively more academic than the mine tour, it was nonetheless interesting. As the only participant, I had a personalised tour. The enthusiasm of the guide, Voychiech (?) was obvious, and he did an admirable job of bringing the castle collection to life, despite English not being his first language. Both tours alone lasted the best part of 2.5 to 3 hours, and with the bone church, I found I spent over 7 hours in the town.
Just a word of warning about the trains though, though there are three stations in the town, the mesto station, situated on a branch line, runs a shuttle service back to hlavni nadarzi, for those who don't fancy the 3km hike back to the main line station. This runs roughly once an hour to coincide with faster trains back to Prague. Bear this in mind when planning your return journey as your return journey may be an hour later than you expect when finishing looking around the town. There are also taxis and a bus service back to the mainline station too.