We thoroughly enjoyed our stay at the Fortress of Solitude. The name fits it well. The 30 acres provide fabulous privacy and make this a great retreat when you just want to get away from it all and be surrounded by nature.
The house is small but does not at all feel cramped. The concrete walls and floor have a lovely finish, not the typical one-dimensional gray. Furnished are tasteful and comfortable, decor is warm and appealing, and necessities such as cookware, dishes, paper towels, and toilet paper were supplied sufficient for our two-night stay.
We enjoyed exploring the woods and finding a nearby creek. The autumn colors were a feast for the sight, and the sounds of nature were great for the soul.
If you're looking to retreat from civilization and just rest and relax, I highly recommend Fortress of Solitude. We'd happily return for a longer stay next time.