I’ve been to the Nashville Parthenon. First learned about it when I took Latin in high school. Built in 1897 for a world’s fair IIRC.
FWIW, the Pantheon in Rome has survived intact for nearly two millenia. Somehow, intact buildings aren’t as interesting as ruins.
The structure built in 1897 was intended to be temporary—it was rebuilt on the same foundations between 1920 and 1931 out of concrete. The statue of Athena inside was added in the 1990s.