Create a stunning image that captures the essence of Art Nouveau, blending flowing lines and intricate patterns with the beauty of nature. Imagine a serene scene where delicate floral motifs intertwine with graceful, curvilinear forms, enveloping a tranquil landscape. The color palette should be rich with earth tones and soft pastels, evoking a sense of harmony and timeless artistry, inviting viewers into a dreamlike world.