The Bath Hotel in Nevis used to be a grand colonial hotel and spa, dating from the height of the British occupation in 1778. Until quite recently the main building was empty and was more or less just a shell, fast on its way to becoming a ruin, but it is currently under restoration in effort involving the whole immediate area, pioneered by the Nevis Historical and Conservation Society, and funded by a special grant from the EU. Although the building itself may become Nevis Government offices rather than a hotel or a museum, it will be pleasing to see the elegant building properly in use once again.
Near the old hotel is a two-story bathhouse from the same period, plus a very simple new open-air bathing place for those who wish to treat their aches and pains by bodily immersion in the beneficial hot spring mineral water.
The spring then runs down into a low-lying wild area a few hundred yards away called "The Boggs", and after that the spring water runs into the bay south of the capital, Charlestown. The Boggs itself is a marshland area, partly salt water and partly freshwater, supporting a lot of interesting wildlife species.
Currently there is no real access to the Boggs, which is at any rate private property, but the whole area, including the Hotel, the Bathhouse, and the Boggs, will over the next few years be restored and conserved and made suitable as a site for interested persons to visit, hopefully without any negative impact on either the archeology or the natural history of the area.
In the meantime people who like to see an interesting "work in progress" will be able to visit the general area. As yet there is nothing much in the way of facilities available for visitors to this site, but that will be changing over time.
While you are there, also visit the nearby Nelson Museum, and the Museum of Nevis History (at the Alexander Hamilton House in Charlestown itself) both of which are excellent.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC