Fingal's Cave a walkway just above high-water level permitting exploration on foot. From the inside, the entrance seems to frame the island of Iona across the water. Romantic composer Felix Mendelssohn visited in 1829 and wrote an overture, "The Hebrides", Op. 26, (also known as "Fingal's Cave overture"), inspired by the weird echoes in the cave. Mendelssohn's overture popularized the cave as a tourist destination. Other famous 19th-century visitors included author Jules Verne, who used it in his book "Le Rayon Vert" ("The Green Ray"), and mentions it in the novels "Journey to the Center of the Earth" and "The Mysterious Island";
Overture Networks with the launch of a new product, "Ensemble OSA". "Ensemble OSA" is an open architecture based on open API standards like OpenFlow and has three layers, which may include Overture-developed components, as well as those developed by service providers or third-party vendors. Overture followed this with the release of the Overture 6500, the first "Ensemble OSA"-ready platform and the inaugural product in its Open Service Delivery Family product line. In January 2016, Overture was acquired by ADVA Optical Networking in a $35 million purchase which was reported to involve "an additional $5 million conditional 'earn-out' payment". Overture's products were generally