According to Wikipedia, the ghost town of Flagstaff is located about 20 miles North of Rangely.  But, if you are planning a visit, you'll want to bring your SCUBA gear...  The town is dozens of feet of water!

The first settlement in the area was constructed during the Revolutionary War, when Benedict Arnold camped there during his expedition to Quebec.

The town was active in the logging industry through the 1940s, but was dismantled (and dis-incorporated) in the 1950s when the Dead River hydroelectric dam was constructed.  The dam's construction caused Flagstaff Lake to enlarge, submerging the town.