Ta Prohm is the modern name of the temple at Angkor, Siem Reap Province, Cambodia, built in the Bayon style largely in the late 12th and early 13th centuries and originally called Rajavihara.

Located approximately one kilometre east of Angkor Thom and on the southern edge of the East Baray, it was founded by the Khmer King Jayavarman VII as a Mahayana Buddhist monastery and university.

Unlike most Angkorian temples, Ta Prohm has been left in much the same condition in which it was found: the photogenic and atmospheric combination of trees growing out of the ruins and the jungle surroundings have made it one of Angkor's most popular temples with visitors.

UNESCO inscribed Ta Prohm on the World Heritage List in 1992. Today, it is one of the most visited complexes in Cambodia’s Angkor region. The conservation and restoration of Ta Prohm is a partnership project of the Archaeological Survey of India and the APSARA. 

Ta Keo is a temple-mountain, possibly the first to be built entirely of sandstone by Khmers.

Ta Keo had to be the state temple of Jayavarman V, it has five sanctuary towers arranged in a quincunx, built on the uppermost level of five-tier pyramid consisting of overlapping terraces (a step pyramid), surrounded by moat, as a symbolic depiction of Mount Meru.

Its particularly massive appearance is due to the absence of external decorations, as carving had just begun when the works stopped, besides an elaborate use of perspective effects. It is considered an example of the so-called Khleang style. The main axis of the temple is E-W and a causeway 500 meters long connects its eastern entrance to a landing stage on the Eastern Baray, with which Ta Keo was in tightly relationship.  The first terrace is 122 m by 106 m. The second terrace is 5.5 m higher. Each of the first two terraces has a gopura at the four cardinal points. Each gopura has three independent passages and a central tower with diminishing tiers. A continuous gallery (1.4 m width) constitutes the inner enclosure of the second terrace. It has windows only towards the interior and measures 80 m by 75 m. It's really interesting, because it has no door and seems to be purely decorative, and is the first example of Khmer gallery. Before Ta Keo (e.g. in Pre Rup) there were long buildings that followed the length of enclosures with some discontinuity. However it hasn't a stone vault, probably its roof was made of wood and tiles too. Along the eastern side of the second terrace in the corners there are two buildings that are the shorter version of the long galleries of the first terrace. More towards the central axis there are two little sandstone "libraries", opening to the west, with false windows on upper storeys. The final pyramid rises 14 m in three narrow steps from the second terrace. Its base is 60 m square, the summit is 47 m square and stands 21.5 m above the ground.

The four stairways that lead on the summit are continuous and very steep.I and everyone else were ok going up but going down was a bit challenging.

At the foot of the eastern one there is a statue of a kneeling Nandi, which confirms that Ta Keo was a Shivaite temple.  The four corner towers on the summit stand on 0.8 m high basements and open to the four cardinal points with protruding vestibules. In the central tower, which dominates the others from its basement 4 meters high, the vestibules are doubled. Fragments of lingas and several statues were found in the sanctuary chambers (some 4 meters wide) and around the towers. The central tower reaches a height of 45 meters.