Things to Do in Iwaizumi

Ryūsendō Cave is one of Japan's three great limestone caves, featuring stunning underground lakes with crystal-clear, cobalt-blue water that reaches depths over 100 meters. The illuminated walkways guide visitors through magnificent stalactite and stalagmite formations that have developed over millions of years, creating an otherworldly subterranean landscape. Located in Iwaizumi, Iwate Prefecture, this natural wonder maintains a constant cool temperature year-round, making it a refreshing escape in summer.