
Dams are as old as civilization itself, but it’s only been within the last century that humans harnessed the construction savvy to build structures that could submerge valleys and create lakes. And bury entire towns in the process.
In America alone, engineers have flooded hundreds of now-forgotten towns in a bid to create power-generating and fresh water-supplying reservoirs. But now, thanks to water shortages caused by a changing climate and increasing demand, many of the so-called “downed towns” are reemerging, broken and dusty, from the water.
Today, Slate and Atlas Obscura take us to a small artificial lake at the nothernmost tip of Italy, where an a 700-year-old belltower peeks above the waters. The photos were cause to look into the history of other drowned towns—and boy, did we find a glut of dramatic images. In fact, submerged towns are so common, it's fairly likely you live near a reservoir that's concealing the remains of one (you can check a partial list of American instances here). A few of the most interesting follow.
St. Thomas Beneath Lake Mead


There are actually multiple submerged towns dotting Lake Mead, including the most famous, St. Thomas. When droughts drain the 80-year-old artificial lake, foundations and sometimes even walls emerge from the sands.
Vilarinho das Furna


Image via Wikimedia Commons.
Vilarinho das Furnas, a town dating back to Roman times, was submerged by engineers in 1972. Interestingly, the tiny community of 300 had been almost forgotten by Portuguese authorities—when it was scouted by engineers in the early 1970s, they found a community governed by an unusual communal political system that some historians speculate dated back to the Visigoth occupation.
The Drowned Church of Potosi

Image via Atlas Obscura and Juan Tello on Flickr.
The town of Potosi, in Táchira, Venezuela, was flooded in 1985 to generate hydroelectric power for nearby developments. But a water crisis in Venezuela is laying the ruins of the town bare—starting with the church steeple that once marked its pinnacle.
Old Petrolandia


Images via Andre Estima on Flickr.
Petrolandia is home to one of Brazil's largest hydroelectric power plants—during construction, entire towns were moved to higher ground. One vestige of the old landscape still remains: the arches of a church that was left, abandoned, to the flood.
Campanile Di Curon


Image via Atlas Obscura and Wikimedia Commons.
This 700-year-old belltower was restored to its original site in 2009, after the entire village of Curon Venosta was flooded after World War II. In winter, you can walk right up to its walls.
[Lead image courtesy of Goribau]
DISCUSSION
The entire Quabbin Reservoir, (the watershed of which provided fresh water for most of Massachusetts) covers about 40 square miles and at least 4 towns. You can still see a number of the ghost town structures from the shore.
Basically the found a spot where a bunch of mountains and valleys intersected, dammed it up, rerouted a river and let the whole thing fill up...something like 400 billion gallons of water. Of course the tops of those mountains are now called islands, some of which might see humans every year or two since water traffic is restricted.