Vanishing America: Knoxville, Tennessee: Photos of the 5th Avenue Motel shortly before rehabilitation.
Urban Exploration Resource: Fifth Avenue Motel: Photos from 2007 showing extent of decay, including a few interior shots. I remember visiting this page around that time and reading a disturbing writeup of an encounter that a so-called "urban explorer" had with some of the Motel's residents. It has since been deleted.
Old Knoxville Stuff: Maps: Links to high-quality historical maps of Knoxville and East Tennessee from 1791–2021.
monkeyfire.com: Partial archive of the Metro Pulse.
Iowa Basement Tapes: Archive of pre-internet independent recordings from Iowa.