Princess Diana and Prince Charles followed very much in the footsteps of the queen in terms of honeymoon destinations. After their 1981 wedding at London's St. Paul's Cathedral, they went to Broadlands for a few days, then headed to the Mediterranean aboard the Britannia. Instead of Malta like Elizabeth and Philip, they visited Sardinia, Greece, and Tunisia and ended their trip with a stay at the Balmoral Estate.
The royal yacht can't even be used by the royal family anymore as it was decommissioned in 1997, but for a stylish Mediterranean tour that's more intimate than a giant cruise ship, Star Clippers have room for only 170 to 227 passengers, depending on the ship. Upping the romantic and memorable factor is the fact that its fleet is all full-rigged sailing ships, and they sail throughout the Mediterranean.