There are plenty of interesting unbuilt projects for some of the world's most famous cities, but there is something particularly unsettling about alternatives for things that were build. Some monuments are so iconic that their alternatives seem like sacrilege.Included here among various alternatives for Tower Bridge, the Washington Monument, The Chrysler building and St. Paul's Cathedral are proposed extensions to the White House, a 5 million tomb alternative to London's famous Victorian cemeteries and a particularly uninspiring second place entry for the Sydney Opera House competition. My personal favorite, however is the Triumphal Elephant which could have capped off the Champs Elysees in Paris. If someone could only find the rejected competition entry for what became the Eiffel Tower, which consisted of a giant replica of a Guillotine.