Ohya Genki-Ro No.06 is a cool art installation that looks like a massive tree underground. It's all about chilling in a steam sauna filled with herbal goodness to boost your health and mood. Created by artist Takashi Kuribayashi, this place is a must-visit for a unique and relaxing experience. Plus, they've got swimsuits and towels for you to use, so you're all set for a steamy adventure!