Rising Sun superyacht is valued at $200 million and was purchased by Oracle CEO Larry Ellison in 2004, according to Robb Report.Rising Sun was later purchased again by Geffen Records executive David Geffen in 2010, according to Club Yacht. Geffen also owns another yacht called Pelorus and his yachts have been frequented by celebrities like Oprah Winfrey, according to the outlet.Aviva, valued at $250 million is 323 feet long and was built in 2017, according to Robb Report. The boat is so large that it has a paddle tennis court that doubles as an indoor soccer field in its interior, according to the outlet.Andreas Hering, the project manager of the shipyard where the boat was constructed, told Boat International that in three years to build a big yacht around a padel tennis court was the main brief, I guess.Octopus, a 414-foot superyacht owned by Microsoft co-founder Paul Allen, is valued at $200 million, according to Robb Report.The boat can accommodate 12 guests in 13 different cabins, according to Yacht Charter Fleet. The boat also has a dance floor and a movie theatre, according to the outlet.Radiant, a superyacht built for Russian oligarch Boris Berezovsky in 2010, is 360 feet long and worth $300 million, according to Robb Report.The boat can accommodate up to 20 guests and 44 crew and sports a beauty salon, gym, pool, and jacuzzi, according to the outlet.The Dubai megayacht, owned by United Arab Emirates Prime Minister Sheikh Mohammed bin Rashid Al Maktoum, is 532 feet long and is worth around $400 million, according to Architectural Digest.Topaz was built in Germany for the deputy prime minister of the United Arab Emirates, Sheikh Mansour bin Zayed Al Nahyan, according to Dubai realtor LuxuryProperty. The nearly 500-foot yacht has a helicopter pad, gym, pool, and cinema hall, according to the realtor. Mansour owns Abu Dhabi United Group, which acquired Manchester United FC in 2008. The 533-foot Eclipse superyacht is valued at $600 million, according to the luxury magazine Robb Report.The Eclipse is owned by Russian oligarch Roman Abramovich, one of 16 yachts and vessels that he owns, according to Forbes.Azzam is the largest and one of the fastest yachts in the world, according to Architectural Digest.The boat took around three years to build and sits at 590 feet long and can travel at a speed of 35 miles per hour, according to the outlet.Azzam is owned by the family of Sheikh Khalifa bin Zayed bin Sultan Al Nahyan, who was the Second President of the United Arab Emirates before his death in May 2022.The 508-foot Al Said sits in the Lürssen shipyard in Germany and was purchased by the former Sultan of Oman, Sultan Qaboos bin Said in 2008 for $600 million, according to Robb Report.The yacht can travel up to 25 miles per hour and has a concert hall that can accommodate a 50-person orchestra, according to the outlet.Dilbar, owned by Russian oligarch Alisher Usmanov, is the largest superyacht in the world and it's valued at $735 million.In April 2022, the yacht was impounded in Germany. German federal police said they seized the yacht after an investigation into offshore concealment and determined that Usmanov's sister is the owner of the yacht. The boat remains at a shipyard in Hamburg, Germany.