Very clearly the feature shown in the photo is NOT Hygeia Spring, for it is a rather small feature atop a geyserite mound. It also (apparently) supplied water to/toward the hotel, which would account for the wooden pipe shown on the map. Thus, the large pool and "geyserite bathtub" is clearly something else that, so far as I know, has no name. If it did really serve as a bathtub, then it seems highly likely that the squared-off end is artificial. Most definitely do not confuse this feature with Bath Spring (in the River Group) or with Baby Bathtub (also River Group). Scott Bryan In a message dated 4/8/2009 6:23:45 P.M. US Mountain Standard Time, jack.ashe at yahoo.com writes: I have the following picture of the Hygeia Spring area of the very lower Lower Geyser Basin (Marshall Hotel group) that I posted on another Yellowstone forum. Originally I thought this feature was the same as Hygeia Spring. However, as I researched the geography more, it appears (see map link below) that there is a difference between the Hygeia Spring per se and the feature with the geyserite tub. If so, what is the geyersite tub called (Bath Tub Spring, Bath Spring ??). Also, was the "tub" (the squared section at the end) manmade or natural? **************New Deals on Dell Netbooks – Now starting at $299 (A HREF=http://pr.atwola.com/promoclk/100126575x1220635155x1201407495/aol?redir=http:%2F%2Fa d.doubleclick.net%2Fclk%3B213771973%3B35379628%3Bw) -------------- next part -------------- An HTML attachment was scrubbed... URL: </geyser-list/attachments/20090409/9dc294ff/attachment.html>