The Netherlands' Hotel de Vrouwe van Stavoren features rooms built inside giant, 14,500 liter wine-casks:
"The rooms offer two single beds as well as an attached sitting room and bathroom. These rooms have been pretty popular with tourists in the sleepy village of Stavoren. If you get tired of the in-room television and radio, you can rent a bicycle and travel along one of the many popular bike paths to see the old growth forests and beach. There is even a famous statue of “Lady van Stavoren” to keep an eye on the harbour as well as an eccentric local story to go along with it."
Room rates range from $40 USD - $150 USD a night.
(via Boing Boing)