Akiyoshido is one of Japan's largest and most impressive limestone caves, located in the Akiyoshidai Quasi-National Park in Yamaguchi Prefecture. Known for its vast, intricate underground chambers, the cave stretches over 10 kilometers, though only a portion is open to the public. Visitors can explore its stunning stalactites and stalagmites, including the breathtaking "Kintai Bridge," a large formation resembling a bridge. The cave also features well-lit walkways that lead visitors through its various chambers, each offering unique rock formations. Akiyoshido is renowned not only for its natural beauty but also for its historical and cultural significance, with the surrounding Akiyoshidai plateau offering panoramic views of lush landscapes and karst topography. The cave is a popular destination for nature lovers, adventurers, and those interested in geology and the mysteries of the underground world.

Motonosumi Inari Shrine is a picturesque Shinto shrine located in Yamaguchi Prefecture, Japan, famous for its stunning row of red torii gates that stretch along a scenic cliffside overlooking the Sea of Japan. The shrine, dedicated to the kami (deity) of agriculture and business, Inari, is unique for its dramatic setting, where the torii gates, numbering over 100, create a striking visual contrast against the deep blue sea and rugged coastline. The torii gates form a path that leads visitors up to the main shrine, providing a serene and almost mystical experience. The shrine is also known for its colorful and vibrant atmosphere, particularly at sunrise and sunset, when the gates glow with the changing light. Visitors often come to offer prayers, take in the natural beauty, and capture photos of the breathtaking views. The shrine holds cultural significance and is a popular spot for both spiritual visitors and photographers seeking to capture the image of torii gates against the sea.

Tsunoshima Bridge, located in Yamaguchi Prefecture, Japan, is a 1,780-meter-long (5,840-foot) bridge connecting the mainland to Tsunoshima Island. Opened in 2000, it is one of Japan's longest toll-free bridges. The bridge is renowned for its graceful curve, designed to preserve the natural environment of Hatoshima, an uninhabited island in the Amagaseto Strait. The surrounding area is celebrated for its stunning scenery, with the azure Amagase Sea and picturesque beaches attracting numerous tourists. The bridge has also gained fame as a filming location for various movies, advertisements, and television programs.