Yes, Westminster Abbey is famously a "forest of stone" where more than 3,300 people are buried or commemorated, and many of these interments are located directly beneath the floor. Visitors literally walk over the graves of some of history's most significant figures, including kings, queens, poets, and scientists. Notable figures buried under the floor include Sir Isaac Newton, Charles Darwin, and Stephen Hawking, whose ashes were interred in Science Corner in 2018. The "Poets' Corner" in the South Transept holds the remains of literary giants like Charles Dickens and Geoffrey Chaucer. Perhaps the most famous floor burial is the Tomb of the Unknown Warrior, located near the Great West Door; it is the only grave in the Abbey upon which it is strictly forbidden to walk, as it serves as a sacred memorial to all unidentified British soldiers killed in World War I. While many of the earliest burials were in raised "chest tombs," the lack of space over the centuries led to the practice of burying cremated remains or coffins directly into the floor vaults, often marked by simple inscribed ledger stones that have become worn by millions of passing footsteps.