Here, the lost city of Mahendraparvata revealed in a shaded relief map of terrain beneath the vegetation in the Phnom Kulen acquisition area, with elevation derived from the lidar digital terrain model at 0.5 meter resolution and 4x vertical exaggeration. Green denotes previously documented archaeological features; areas shaded red contain newly documented features indicative of an extensive urban layout.
A lost city known only from inscriptions that existed some 1,200 years ago near Angkor in what is now Cambodia has been uncovered using airborne laser scanning.
The previously undocumented cityscape, called Mahendraparvata, is hidden beneath a dense forest on the holy mountain Phnom Kulen, which means "Mountain of the Lychees."
The cityscape came into clear view, along with a vast expanse of ancient urban spaces that made up Greater Angkor, the large area where one of the largest religious monuments ever constructed — Angkor Wat, meaning "temple city" — was built between A.D. 1113 and 1150. [See Images of Angkor Wat, New Temple City]
For the rest of the story: http://www.livescience.com/37520-lost-medieval-city-discovered-beneath-cambodian-jungle.html