"Discover England's Rich and Royal Maritime History To do Greenwich properly, you should really arrive by boat. After all, this is the site of the former Tudor palace that was home to Henry VIII, which is now buried beneath the Old Royal Naval College — a former hospital for wounded sailors turned training establishment for the British Navy. Those beautiful Christopher Wren-designed buildings (a UNESCO World Heritage Site) are worth the trip alone — and free to enter—but the National Maritime Museum is a fascinating attraction, telling the story of how Britannia came to rule the waves. As well as a roster of constantly changing exhibitions, the museum incorporates entry to the Royal Observatory where you can stand on the Prime Meridian, and there's the famous Cutty Sark , the only remaining ship of its kind. As for getting there and away, take the Thames Clippers service for a view of London from the river."