Today's Moon is Titania, the largest moon of Uranus.Uranus and Neptune have only been visited once, by the Voyager 2 spacecraft (and, heartbreakingly, there are no plans to return anytime soon). As a result, we know comparatively little about their moons. Only about 40% of Titania's surface has been observed close-up, and the closest Voyager 2 ever came to Titania was 365,200 km... yielding a maximum spatial resolution of 3.4 km. We will have to wait many more years to improve on the few tantalizing images we've captured from the depths of the solar system.
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