🇺🇸 United States · Archaeological wonder
Number One Observatory Circle
official residence of the vice president of the United States
🇺🇸 United States · Hydraulic works
Tulloch Dam
dam in Calaveras County, California, United States of America
🇺🇸 United States · Ancient village
Navajo National Monument
national monument in northern Arizona, USA
🇺🇸 United States · Hydraulic works
Grand Coulee Dam
The Grand Coulee Dam is a concrete gravity dam on the Columbia River in the U.S. state of Washington, built to produce hydroelectric power and provide irrigation water.
🇺🇸 United States · Mound
Ely Mound
Mississippian culture
Ely Mound is a historic burial mound located near Rose Hill, Lee County, Virginia. It is considered the best-preserved Mississippian culture site in Virginia.
🇺🇸 United States · Hydraulic works
Grant's Canal
Grant's Canal (also known as Williams's Canal) was an incomplete military effort to construct a canal through De Soto Point in Louisiana, across the Mississippi River from Vicksburg, Mississippi.
🇺🇸 United States · Archaeological wonder
Blue Hill Meteorological Observatory
The Blue Hill Meteorological Observatory in Milton, Massachusetts is the foremost structure associated with the history of weather observations in the United States.
🇺🇸 United States · Hydraulic works
Duluth Ship Canal
The Duluth Ship Canal is an artificial canal cut through Minnesota Point, providing direct access to Duluth harbor from Lake Superior.
🇺🇸 United States · Ancient city
Isunigu
Isunigu (also called Seneca, Esseneca, and Sinica) was a Cherokee town on the Keowee River. It was on the west side of the Keowee River, near the mouth of Coneross Creek, in today's Oconee County,…
🇺🇸 United States · Earthwork
Center for American Archeology
The Center for American Archeology, or CAA, is an independent non-profit 501(c)(3) research and education institution located in Kampsville, Illinois, USA, near the Illinois River.
🇺🇸 United States · Hydraulic works
Bonneville Dam
Bonneville Lock and Dam consists of several run-of-the-river dam structures that together complete a span of the Columbia River between the U.S. states of Oregon and Washington at River Mile 146.1.
🇺🇸 United States · Hydraulic works
Illinois and Michigan Canal
The Illinois and Michigan Canal connected the Great Lakes to the Mississippi River. In Illinois, it ran 96 miles (154 km) from the Chicago River in Bridgeport, Chicago, to the Illinois River at…
🇺🇸 United States · Archaeological wonder
Hopkinton Dam and Spillway
The Hopkinton Dam and Spillway is a historic site at the eastern end of Hopkinton Reservoir in Hopkinton State Park in Ashland, Massachusetts.
🇺🇸 United States · Ancient village
Canyon de Chelly National Monument
Canyon de Chelly National Monument ( də-SHAY) was established on April 1, 1931, as a unit of the National Park Service.
🇺🇸 United States · Hydraulic works
Edwards Dam
Edwards Dam was a hydroelectric dam on the Kennebec River in the U.S. state of Maine. It was located in Augusta, Maine, about 40 miles (64 km) upstream from the Atlantic Ocean.
🇺🇸 United States · Hydraulic works
Franklin Canal (Texas)
The Franklin Canal is an irrigation canal in the Upper Rio Grande Valley near El Paso, Texas. The canal acquires water from the Rio Grande via the American Canal.
🇺🇸 United States · Necropolis
Colma, California
Colma (Ohlone for 'springs') is a small incorporated town in San Mateo County, California, United States, on the San Francisco Peninsula in the San Francisco Bay Area.
🇺🇸 United States · Hydraulic works
Holtwood Dam
Holtwood Dam (also Holtwood Hydroelectric Dam, Holtwood Hydroelectric Plant, McCalls Ferry Dam) is the oldest of three major dams built across the lower Susquehanna River, and the middle location of…
🇺🇸 United States · Hydraulic works
American Canal
The American Canal is an irrigation canal in the Upper Rio Grande Valley near El Paso, Texas.
🇺🇸 United States · Archaeological wonder
Governor Aker Observatory
Governor Aker Observatory is an astronomical observatory, part of Eastern Arizona College's Discovery Park Campus (formerly known as Discovery Park) in Safford, Arizona (US).
🇺🇸 United States · Hydraulic works
Embudo Creek
Embudo Creek, also known as Rio Embudo, is formed by the confluence of the Rio Pueblo and Santa Barbara Creek near Peñasco in Taos County, New Mexico.
🇺🇸 United States · Archaeological wonder
American Lighthouse Foundation
The American Lighthouse Foundation (ALF) is a 501(c)(3) non-profit organization founded in 1994 with a primary mission of lighthouse preservation.