Second only to Ise among Shinto shrines, Atsuta is roughly 1,900 years old and holds the Kusanagi sword, one of the three Imperial Regalia. The sword is a hidden object of worship and never goes on display, so what you see is a wooded precinct and plain Shinmei-style halls. The grounds are free and open at all hours.
Built during the reign of King Keiko, other names for the shrine are the Atsuta-Sama or the Miya. Shinto is a religion unique to Japan. Do visit here once to sample what a religious ceremony or prayer offerings are like or even just to breathe in the tranquil aura of the space. Must-do if you like to explore traditional architecture too.