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";
Helios Overture Helios Overture Carl Nielsen's Helios Overture, Opus 17, is a concert overture which was first performed by the Royal Danish Orchestra, conducted by Johan Svendsen, on 8 October 1903 in the large hall of the Odd Fellows Mansion in Copenhagen. Besides his well-known six symphonies, the Danish composer Carl Nielsen wrote many short orchestral works, one of the most famous being the "Helios Overture". In 1902, Nielsen signed a contract with the publisher Wilhelm Hansen, which allowed him to go to Athens, Greece, to join his wife Anne Marie Carl-Nielsen, who was one of the first sculptors allowed to make