  We use lithium-6 atoms in an optical tweezer array to realize an eight-site
Fermi-Hubbard chain near half filling. We achieve single site detection by
combining the tweezer array with a quantum gas microscope. By reducing disorder
in the energy offsets to less than the tunneling energy, we observe Mott
insulators with strong antiferromagnetic correlations. The measured spin
correlations allow us to put an upper bound on the entropy of
0.26(4)$k_\mathrm{B}$ per atom, comparable to the lowest entropies achieved
with optical lattices. Additionally, we establish the flexibility of the
tweezer platform by initializing atoms on one tweezer and observing tunneling
dynamics across the array for different 1D geometries.
