The largest yacht ever built is the Azzam, measuring a whopping 590 feet. Owned by Sheikh Khalifa bin Zayed Al Nahyan of the United Arab Emirates, this mega-vessel is a marvel of extravagance and luxury. With a top speed of 30 knots and accommodations for up to 64 guests, it redefines opulence on the seas. A true testament to engineering prowess, the Azzam reigns supreme as the largest yacht in the world.