El Caracol is sometimes referred to as the observatory ” To modern eyes, the rounded dome of El Caracol—actually the decayed remains of what was a cylindrical structure—looks a lot like it could house a telescope El Caracol, the Observatory, is a unique. El Caracol is sometimes referred to as the observatory ” To modern eyes, the rounded dome of El Caracol—actually the decayed remains of what was a cylindrical structure—looks a lot like it could house a telescope El Caracol, the Observatory,