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.
15 Most Amazing Places In The World You Won't Believe That Actually Exist!
Cave of the Crystals or Giant Crystal Cave is a cave connected to the Naica Mine 300 metres ft) below the surface, in Naica, Chihuahua, Mexico. The main chamber contains giant selenite crystals (gypsum, some of the largest natural crystals ever found.
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.
The Wishing Well glows blue-green at Luray Caverns, Virginia; originally called Luray Cave, which is a large commercial cave just west of Luray, Virginia, USA. Discovered in the Caverns are in the Shenandoah Valley just east of the Allegheny Range