Tufa, a porous volcanic rock, has been used for centuries to create stunning outdoor sculptures. Among the most famous is the "Great Sphinx of Giza," carved from limestone-tufa hybrid stone, standing as a timeless symbol of ancient Egypt. Another iconic piece is the "Moai" statues of Easter Island, crafted from compressed volcanic ash (a tufa-like material), which continue to captivate visitors with their mysterious presence.

In modern art, the "Tufa Towers" at Mono Lake, California, are natural formations often compared to surreal sculptures. Additionally, the "Rock-Hewn Churches of Lalibela" in Ethiopia, carved from soft tufa rock, showcase breathtaking religious artistry. These masterpieces highlight the versatility and enduring beauty of tufa as a medium for outdoor sculpture.

From ancient wonders to natural phenomena, tufa sculptures remain a testament to human creativity and geological marvels. Their unique textures and durability make them stand out in the world of art and architecture.