<P> The royalty area, a sector for the nobility, is a group of houses located in rows over a slope; the residence of the amautas (wise persons) was characterized by its reddish walls, and the zone of the ñustas (princesses) had trapezoid - shaped rooms . The Monumental Mausoleum is a carved statue with a vaulted interior and carved drawings . It was used for rites or sacrifices . </P> <P> The Guardhouse is a three - sided building, with one of its long sides opening onto the Terrace of the Ceremonial Rock . The three - sided style of Inca architecture is known as the wayrona style . </P> <P> In 2005 and 2009, the University of Arkansas made detailed laser scans of the entire site and of the ruins at the top of the adjacent Huayna Picchu mountain . The scan data is available online for research purposes . </P> <P> This semicircular temple is built on the same rock overlying Bingham's "Royal Mausoleum", and is similar to the Temple of the Sun found in Cusco and the Temple of the Sun found in Pisac, in having what Bingham described as a "parabolic enclosure wall". The stonework is of ashlar quality . Within the temple is a 1.2 m by 2.7 m rock platform, smooth on top except for a small platform on its southwest quadrant . A "Serpent's Door" faces 340 °, or just west of north, opening onto a series of 16 pools, and affording a view of Huana Picchu . The temple also has two trapezoidal windows, one facing 65 °, called the "Solstice Window", and the other facing 132 °, called the "Qullqa Window". The northwest edge of the rock platform points out the Solstice Window to within 2' of the 15th century June solstice rising Sun . For comparison, the angular diameter of the Sun is 6' . The Inca constellation Qullca, storehouse, can be viewed out the Qullqa Window at sunset during the 15th century June Solstice, hence the window's name . At the same time, the Pleaides are in the opposite end of the sky . Also seen through this window on this night are the constellations Llamacnawin, Llama, Unallamacha, Machacuay, and the star Pachapacariq Chaska (Canopus). </P>

What can be found at the top of machu picchu