Frogmore

There is more to Frogmore than the Royal Burial Ground. According to Wikipedia, the Frogmore Estate "comprise[s] 33 acres (130,000 m2) of private gardens within the Home Park, adjoining Windsor Castle", and is also known as Frogmore Gardens.

The Royal Burial Ground is part of the Estate. Quoting Wikipedia again: "Consecrated on 23 October 1928, it surrounds the Royal Mausoleum, which was built in 1862 to house the tomb of Queen Victoria and Prince Albert."

The bodies of eight members of the Royal Family were moved to Frogmore from St. George's Chapel (the place of worship in Windsor Castle) following its consecration in 1928. Twenty–three more have been buried there since, including the Duke and Duchess of Windsor (in 1972 and 1986 respectively). The last two have been Princess Alice – wife of Prince Henry, the 1st Duke of Gloucester, and at 102 the oldest ever member of the British Royal Family – in 2004, and Angus Ogilvy, the husband of Princess Alexandra (in 2005).

Frogmore House and Frogmore Cottage are also on the Frogmore Estate. The Cottage is the home that Prince Harry and Meghan Markle (the Duke and Duchess of Sussex) live in when they are in the United Kingdom, and the House is basically where the Royal Family do their entertaining – the last notable occasion apparently being Harry and Meghan's wedding reception.

In case you were wondering, Princess Margaret and the Queen Mother (who both died in 2002) are both buried in St. George's Chapel.