The relics of a 16th-century church built by Spanish colonisers has emerged from a reservoir in the south of Mexico.
It is the second time the church, usually submerged on the reservoir bed, has been revealed in the state of Chiapas as a result of drought.
A water level drop of at least 80 feet in the Grijalba river which feeds the reservoir has revealed the 400-year-old roofless religious building, with its 10 metre high walls, 61 metre length and 14 metre wide hall.
The river was last this low in 2002, when visitors were able to walk about inside the church.
Today, fishermen are ferrying curious passengers around the ruins, which were submerged in 1966 when the nearby dam was completed and the area flooded.
Architect Carlos Navarrete, who worked with authorities on a report about the building, said: "The church was abandoned due to the big plagues of 1773 to 1776."
It is linked to a famous figure in Spanish history, namely Friar Bartolome de las Casas, who arrived in the Quechala locality in the mid-16th century with a group of monks that built the church.
Bartolome de las Casas was the first Bishop of Chiapas and initially supported the colonisation and subjugation of the native Indians of the region.
In later years, however, he advocated strongly for the abolition of slavery, both in situ and back in the Spanish court of King Charles V.
He managed to get the New Laws passed in 1542 which curtailed many of the slavery practices in Peru. They were so unpopular with settlers in the South America that King Charles backed down and removed some of the most important aspects of the legislation.
In pictures: 12 amazing archaeological discoveries
In pictures: 12 amazing archaeological discoveries
1/12 Ancient forest, discovered in February 2014
Ancient forest revealed by storms. The recent huge storms and gale force winds that have battered the coast of West Wales have stripped away much of the sand from stretches of the beach between Borth and Ynyslas. The disappearing sands have revealed ancients forests, with the remains of oak trees dating back to the Bronze Age, 6,000 years ago. The ancient remains are said by some to be the origins of the legend of ‚Cantre‚r Gwealod‚ , a mythical kingdom now submerged under the waters pif Cardigan Bay
2/12 Medieval royal palaces, discovered in November 2014
Archaeologists in southern England have discovered what may be one of the largest medieval royal palaces ever found – buried under the ground inside a vast prehistoric fortress at Old Sarum. The probable 12th century palace was discovered by archaeologists, using geophysical ground-penetrating ‘x-ray’ technology to map a long-vanished medieval city which has lain under grass on the site for more than 700 years
3/12 The Dead Sea Scrolls, discovered ca. 1950
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4/12 Diamond, discovered in March 2014
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5/12 Whale skeletons, discovered in February 2014
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6/12 Complete mammoth skeleton, discovered in November 2012
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7/12 Million-year-old human footprints, discovered in February 2014
Photograph of the footprint hollows in situ on the beach as Happisburgh, Norfolk
8/12 Terracotta warrior, discovered in June 2010
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© Jason Lee / Reuters
9/12 Neolithic 'lost avenue' - prehistoric stone circle, discovered in September 1999
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10/12 Byzantine mosaic, discovered in February 2007
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11/12 Ancient gold, discovered in March 2014
Gold fitting for a dagger sheath (around 1900 BC.) found near Stonehenge
12/12 Rosetta Stone, discovered in 1799
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The church depended on the nearby monastery of Tecpatan, and was on the Chiapas' king's highway, built by Spanish settlers and still in use in the 20th century.