Marble Caves, Chile Paddle through Lake General Carrera on the Chile-Argentina border and you'll stumble upon some otherworldly treasures. Millenniums of lapping waves carved calcium carbonate into the swirling caverns known as the Cuevas de Mármol.
This one seemed like an interesting fit for the figure and ground concept in terms of colors. The reds draw attention to the figure in the center, whereas the greys and blues act as the negative space of the image.
Lake Superior Ice Caves on Grand Island, just off the shore in Munising, Michigan. A short walk from Sand Point Beach across frozen Lake Superior will leave you at the base of ice curtains more than 30 feet tall and stretching hundreds of feet wide.