Peary Crater (diameter 73 km), located near the lunar north pole, has been a subject of interest for many lunar scientists for years. In the 1990's NASA's Clementine mission imaged the crater, and scientists identified regions surrounding Peary that they suspect remain constantly in daylight throughout the 28 day lunar cycle. However parts of Peary's interior remain in permanent shadow at all times, providing only limited views of its contents. Topographical data from LOLA reveal details hidden in permanently shadowed regions, like those in Peary, that visible light cameras cannot easily image.
NASA Lunar Orbital Laser Altimeter (LOLA) project
NASA: <a rel="nofollow" class="external free" href="https://lola.gsfc.nasa.gov/images/weekly/peary.jpg">https://lola.gsfc.nasa.gov/images/weekly/peary.jpg</a>