In Siegel et al. 2011 we presented a stereoscopic view of the central ~ 15 degrees of the Sagittarius dwarf and its closest 4 globular clusters (their Figure 15). There are two techniques with which to view such stereoscopic images that do not require any equipment, either cross-eyed or parallel-eyed viewing. Both methods have their advantages and disadvantages: cross-eyed viewing has the benefit of working for arbitrary image sizes and separations but can produce headaches, while parallel-eyed viewing is more 'natural' and less prone to producing headaches but much more restrictive with regard to image size and separation (the two image centers must be about 7cm apart). Viewing method of choice tends to be a personal preference, on this webpage we present Figure 15 of Siegel et al. (2011) in both cross-eyed and parallel-eyed variants.
For those unfamiliar with how to view stereoscopic images, there are many good tutorials available on the web. One of the most concise and helpful that I've found is located here. Note that distance scales are provided in the plots below for reference, the '25' kpc marker should appear to float above the '31' kpc marker; if the apparent depths are reversed, you're using the wrong technique (i.e., using parallel-eyed vision to view the cross-eyed plot or vice-versa). Practice improves the ease of viewing, and these particular images are somewhat difficult to visualize thanks in part to the large number of M-giant data points. One trick that can be helpful is to focus first on the distance scale, and (when the stereoscopic illusion is clear) gradually shift attention to the rest of the image.
