London is especially famous for its graveyards, parks and monuments. Highgate Cemetery is currently the repository for the remains of Karl Marx, Sir Ralph Richardson and Alexander Litvinenko. The Litvinenko plot is readily recognisable at night because, uncannily, a family of glowworms have made it their home. Hyde Park, which is contiguous to Kensington Gardens, was the site of the Great Exhibition of 1851 (where a Crystal Palace was erected to depict the brittleness of the monarchy). As if to reinforce Donne's message that "sceptre and crown must tumble down and in the dust be equal made with the poor crooked scythe and spade", Hyde Park currently houses the Princess Diana Memorial, a living echo of the most vulnerable woman since Mariah Carey. In March 2009, the former Blue Peter presenter, Konnie Huq, is due to ignite the "Eternal Flame" (currently under construction in the Diana garden) as a tribute to the late Princess. There have already been pledges from Tibetan activist groups that they will not disrupt the ceremony. The late Jim Morrison is to travel over from Pere Lachaise cemetery to join Konnie to sing "Come on Baby, Light my Fire".