One step removed from the bubbling cauldron popularized by witches and cannibals, the Portable Wood-Burning Hot Tub is a must for anyone with sore muscles and $6,000 to spare.
The 200-gallon polyester tub heats water through a coil system, using burning wood to heat up the water. The water temperature hits 104 degrees in two and a half hours. There are no jets, but water circulates through the tub through the miracle of convection.
With a 60-inch diameter and a weight of 165 pounds, the tub is only "portable" if you are very strong and have long arms. Anything is portable if you are the mighty Hercules.