Nima Sand Museum is an odd, memorable stop: a cluster of glass pyramids designed by architect Shin Takamatsu, with a giant central hourglass that takes a full year to drain. The museum treats sand as geology, timekeeper, craft material, and local curiosity rather than just beach grit.
It is not a grand museum, but it is distinctive and easy to pair with the coast or Iwami Ginzan. The nearby singing-sand beaches help the theme make sense once you step outside.