🇺🇸 United States · Archaeological wonder
Camera Obscura (San Francisco)
The Camera Obscura is a large-scale camera obscura, in the Lands End area of the Outer Richmond District in western San Francisco, California.
🇺🇸 United States · Megalith
Bighorn Medicine Wheel
Late Prehistoric 1200–1700 CE · Plains Indians
24 m medicine wheel 28 spokes, solstice alignments.
🇺🇸 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 · Archaeological wonder
Snaketown Ball Court 1
Multi-period (4000 BCE–1000 CE) · Multi-period
Snaketown Ball Court 1 in Arizona, Snaketown, United States is a Multi-period (4000 BCE–1000 CE) archaeological wonder attributed to Multi-period.
🇺🇸 United States · Archaeological wonder
Number One Observatory Circle
official residence of the vice president of the United States
🇺🇸 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 · 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 · 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.
🇺🇸 United States · Archaeological wonder
Vocational Agriculture Building
building in Florida, United States
🇺🇸 United States · Archaeological wonder
Fairbanks Museum and Planetarium
The Fairbanks Museum & Planetarium is a combination natural science museum, history museum, and planetarium located in St. Johnsbury, Vermont.
🇺🇸 United States · Archaeological wonder
Bonnet Carré Spillway
The Bonnet Carré Spillway is a flood control operation in the Lower Mississippi Valley. Located in St.
🇺🇸 United States · Archaeological wonder
Ashland Dam and Spillway
The Ashland Dam and Spillway is a historic site at the north end of Ashland Reservoir in Ashland State Park in Ashland, Massachusetts.
🇺🇸 United States · Archaeological wonder
United States Lighthouse Service
former agency of the United States government
🇺🇸 United States · Archaeological wonder
Hawaiian Volcano Observatory
The Hawaiian Volcano Observatory (HVO) is an agency of the United States Geological Survey (USGS) and one of five volcano observatories operating under the USGS Volcano Hazards Program.