Oasis in a Cathedral: Watercolor Reverie

Inside a grand cathedral nave, an oasis blooms where desert meets sacred space. A crystal-clear pool mirrors the soaring arches, gilded columns, and tessellated floor. Surrounding the water are lush date palms, tropical ferns, and creeping vines that thrive in this holy light. Soft watercolor washes bleed into each other: emerald greens, turquoise blues, warm sand tones, and jewel-toned reflections from stained glass. Light streams through intricate stained glass windows, casting multicolored patterns on marble, stone, and rippling water. The scene is dreamlike and tranquil, with a painterly, impressionistic quality achieved in wet-on-wet watercolor: delicate edges, subtle granulation, gentle blends. Perspective can be panoramic down the nave or from water level to emphasize towering ceilings and glowing windows. Mood: serene, otherworldly, ethereal.