The RMS Titanic was the brainchild of the famous White Star Line, which specialized in luxury passenger vessels, and Harland & Wolff, the Irish shipyard which designed and built her.

One-sixth of a mile long, Titanic was not only the largest moving object ever built by man, she was also the most opulent.

More than 14,000 laborers and craftsmen poured their hearts and souls into her design, construction and appointment, toiling on her for four long years. So mighty was Titanic, with her sheer size and cutting-edge watertight features, she was promptly touted as "unsinkable."

That epithet proved particularly ironic the night of April 14, 1912, when Titanic, just days into her maiden transatlantic crossing, struck an iceberg and immediately began to take on water. Within a few short hours, the greatest ship in the world had come to rest on the bottom of the ocean, taking with her the lives of more than 1,500 people.

Now 90 years later her mystique and grandeur still captivates people around the world.

Today, the Titanic is reachable only via deep-diving vessels capable of reaching ocean depths of 20,000 feet. Housed aboard the mothership Akademik Keldysh, the two MIR submersibles used in the movie "Titanic" are part of a group of only five deep-diving vessels available to the world's scientific community and are the only two that are used for commercial diving trips to the Titanic.