The Inner Shrine (Kotai Jingu or Ise Jingu Naiku) is like the VIP section of the Ise Shrines in Ise City, Japan. It's where the Sun Goddess hangs out, making it the holiest of holy places in Shinto. The shrine's been around for over 2000 years and gets a makeover every 20 years. Visitors can stroll through serene forests, purify themselves in the sacred river, and catch a glimpse of the main hall where the Sun Goddess resides. It's all about simplicity, tradition, and a whole lot of spiritual vibes at this ancient spot.