Gregory Deyermenjian
Gregory Deyermenjian is a psychologist and explorer. In 1981 he visited the ruins of Vilcabamba la Vieja at Espíritu Pampa, and then turned his attention to the northeast and north of Cusco, Peru. Since the mid-1980s he has made numerous expeditions to Peru
Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

 investigating Paititi
Paititi is a legendary Inca lost city or utopian rich land said to lie east of the Andes, hidden somewhere within the remote rain forests of southeast Peru, northern Bolivia or southwest Brazil...

, a legendary lost city that is part of the history and legend around the western Amazon basin. He is a long-term Fellow of The Explorers Club
The Explorers Club
The Explorers Club is a professional society dedicated to scientific exploration of Earth, its oceans, and outer space. Founded in 1904 in New York City, it currently has 30 branches world wide...


He has participated in extensive explorations and documentation of Incan remains in Mameria
Mameria is an area of high-altitude jungle to the northeast of the Paucartambo range in southeast Peru, drained by the Mameria river, an affluent of the Nistrón river. Until the 1960s this remote and sparsely populated area would have been considered a part of the Callanga jungle area...

 (1984, '85, '86, and '89); the first ascent of Apu Catinti (1986); the documentation of Incan "barracks" at Toporake (1989); the exploration and documentation of the petroglyphs at Pusharo
The Petroglyphs of Pusharo constitute a unique and extensive ancient rock art site in southeast Peru's Manu National Park, a jungled expanse that still contains unexplored and little known areas, and for which an official government permit is required for entry....

 (1991); a traverse of the Incan "Road of Stone" past the Plateau of Toporake (1993); the discovery and documentation of Incan and pre-Incan remains in Callanga (1994); the discovery and first ascent of an Incan complex at base of Callanga's peak "Llactapata" (1995); the first visit, exploration, and documentation of the true nature of Manu's
Manú Province
Manu Province is one of three provinces in the Madre de Dios Region of Peru. The capital of the Manu province is the city of Salvación.-Political division:The province is divided into four districts , each of which is headed by a mayor :...

 Pyramids of Paratoari (1996); following the Incan "Road of Stone" onto the Plateau of Pantiacolla, discovery of "Lago de Ángel" and its Incan platforms north of Río Yavero (1999); and full investigation of claims that Paititi was to be found on Río Choritiari (2000).

In June 2004 the "Quest for Paititi" exploration team of Deyermenjian and ongoing expedition partner Paulino Mamani—along with expedition partner from the 1980s, Goyo Toledo—discovered several important Incan ruins along branches of the Incan Road of Stone at the peak known as Último Punto in the northern part of the Pantiacolla region of Peru. In 2006 Deyermenjian and Mamani returned to the Río Taperachi north of the Yavero, finding the furthest Incan settlements yet identified beyond the highland remains they had found in 2004 at "Último Punto." In 2008 Deyermenjian and Hermógenes Figueroa explored a more southern stretch of the Incan "Road of Stone" and documented the existence of the stone remains of what appears to be an unnamed Incan guardpost complex in the highlands overlooking an entrance to the lowland area of Callanga. In 2009 Deyermenjian and Mamani re-investigated the middle portion of the camino de piedra, the road of stone, coming upon a previously overlooked stretch of road extensively covered in large paving stones and with extensive retaining and containing walls. And in 2011 Deyermenjian´s team extensively explored and formally documented the archaeological complex of "las ruinas de Miraflores" leading up to the Incan barracks of Toporake, on the way towards the Meseta de Pantiacolla, the legendary resing place of the culture-hero Inkarrí at his oasis of "Paititi."

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