Vermont's ghost towns are hill farms, logging camps and mill hamlets that the mountains and the markets wore down. Glastenbury and Somerset, high in the southern Green Mountains, were logging towns. Glastenbury also burned charcoal and had 241 people in 1880; Somerset had over 300 in 1850. Both lost their people as logging declined, and the legislature unincorporated them in 1937. The Somerset Reservoir now covers part of Somerset, and Glastenbury had 9 people at the 2020 census.
Others ended in fire and flood. Greenbanks Hollow in Danville lost its woolen mill, store, post office and covered bridge to a fire in 1885, and most of its people left. The farms, sawmills and schools of the Ricker Basin above Waterbury were bought up from the early 1920s; after the great flood of 1927 the Civilian Conservation Corps began the Waterbury Dam in 1934. Sterling, near Stowe, was dissolved in 1855 and its village abandoned by the mid-20th century; Wikipedia's list also names villages under the Harriman, Comerford and Moore reservoirs.
What survives is cellar holes, stone walls, cemeteries and a covered bridge, much of it on state park or national forest land with marked trails.