This is a little off the beaten pass, but well worth the drive. We recently visited Redstone Castle, and thoroughly enjoyed the tour. We got to the town of Redstone earlier in the day, and many of the shops were well versed in the tour and we bought tickets from one of the local stores. (Not sure you can actually buy tickets at the castle, so I'd definitely get them bought in town.) If you are looking for signs on how to get to the castle, you won't find any, but the local shopkeepers were very helpful in pointing us in the right direction. The tour guide was delightful, definitely an expert in the castle. The tour started in the carriage area, and included visiting the parlor and dining room area, the bedrooms, and the downstairs billiard area. There were pictures of the castle and it's furnishings when it was originally built and many of the rooms are still very much the same. After the tour was over, you were encouraged to go back and visit any of the rooms that you wanted to spend more time in. My favorite room was the library, where the wall coverings were from elephant skin, and there were books filling all of the many bookcases. The original owner/builder of the castle; Osgood, played a major role in Colorado History and the developments of coal mining and the railroads. If you enjoy history, don't miss this tour.