  We present a comprehensive review of nuclear magnetic resonance (NMR) studies
performed on three nanoscale molecular magnets with different configurations of
geometrically frustrated antiferromagnetic (AFM) triangles, new spin
frustration systems with different novel structures: (1) the isolated single
AFM triangle K$_6$[V$_{15}$As$_6$O$_{42}$(H$_2$O)]$\cdot$8H$_2$O (in short
V15), (2) the spin ball [Mo$_{72}$Fe$_{30}$O$_{252}$(Mo$_2$O$_7$(H$_2$O))$_2$
(Mo$_2$O$_8$H$_2$(H$_2$O))(CH$_3$COO)$_{12}$(H$_2$O)$_{91}$]$\cdot$150H$_2$O
(in short Fe30 spin ball), and (3) the twisted triangular spin tube
[(CuCl$_2$tachH)$_3$Cl]Cl$_2$ (in short Cu3 spin tube).
