Outdoor sculptures made of cosmic altars are rare yet mesmerizing artistic expressions that blend celestial symbolism with public art. These installations often evoke a sense of wonder, connecting viewers to the vastness of the universe. One of the most renowned examples is "Celestial Gateway" by artist James Turrell, a massive stone altar-like structure that frames the sky, creating an immersive experience of light and space. Another notable piece is "Stellar Shrine" by Anish Kapoor, a reflective cosmic altar that mirrors the heavens, inviting contemplation.

In Iceland, the "Cosmic Ring" stands as a minimalist yet powerful tribute to the cosmos, crafted from volcanic rock to resemble an ancient astronomical tool. Similarly, the "Altar of the Infinite" in New Mexico uses meteorite fragments, merging earthly materials with extraterrestrial origins. These sculptures not only beautify public spaces but also serve as portals to philosophical and spiritual reflection. Their enduring appeal lies in their ability to transcend cultural boundaries, offering a universal language of art and cosmos.