Does Jeff Bezos intend to live to be 10,000 years old? Why else would he spend US$42 million on building a 10,000-year clock inside a mountain in Texas? Why are all these billionaires wearing watches that even you can afford? Dubbed “The Clock of the Long Now”, Bezos revealed via Twitter that installations began earlier in the year. He posted footage of work in progress, which is located inside a mountain in the Sierra Diablo mountain range in Texas. The mechanical clock, according to Bezos’ tweet, is powered by day/night thermal cycles. It will reportedly measure 150 metres in diameter (500 feet). Why is Jeff Bezos getting richer while other billionaires are losing money? The tech billionaire shared that the project was based on a design that first came to light in 1986 by computer scientists and MIT professor Danny Hillis. Installation has begun—500 ft tall, all mechanical, powered by day/night thermal cycles, synchronized at solar noon, a symbol for long-term thinking—the #10000YearClock is coming together thx to the genius of Danny Hillis, Zander Rose & the whole Clock team! Enjoy the video. pic.twitter.com/FYIyaUIbdJ — Jeff Bezos (@JeffBezos) February 20, 2018 The two began talks of building the clock back in 2005, and began building the clock in 2018. According to the project’s website, there’s no projected date of completion. View this post on Instagram A post shared by Jonathan Hughes (@jjhughes1969) on Jul 8, 2018 at 7:13am PDT The piece is described as measuring several hundred feet and is designed to run for 10,000 years. The chiming clock will play melodies only once, at random intervals, programmed to play a unique tune each time over the course of 10,000 years. View this post on Instagram A post shared by Andy Ellis (@andywellis) on Oct 20, 2018 at 6:08am PDT Check out LA’s US$1 billion mountain, scoped by Jeff Bezos and Tom Cruise While there’s no knowing when the clock will be completed, the website assures that once ready, the site will be open to the public. Getting there, however, will be its own challenge. The nearest airport, according to the site, is several hours away by car and the rugged foot trail to the clock will take even a bigger commitment as it’s located almost 600 metres (2,000 feet) above the valley floor. Want more stories like this? Sign up here . Follow STYLE on Facebook , Instagram , YouTube and Twitter .