Hadrian's Wall, England: a defensive fortification in Roman Britain. Built 122 AD, the first of two fortifications, the second being Antonine Wall. It is opn national cycle route 72, a UNESCO world Heritage site (1987). Most popular tourist site in N. Eng, most important monument built by Romans in Britain.
The Pacific island of Palau (which has one of Asia’s best human rights records) created the world’s first shark sanctuary. The Rock Islands Southern Lagoon, a UNESCO World Heritage site, is breathtakingly beautiful.