A state of Australia, one of the world's biggest waterfalls, a London railway station, Africa's largest lake and a large public park in Hong Kong are all named after whom?
In the "Harry Potter" books, students board the train to Hogwarts at Platform 9+3⁄4. Which London railway station has erected a sign at a wall between tracks 9 and 10 to commemorate this?
A shallow ephemeral lake in the Gawler Ranges, South Australia, is at the centre of what - now largely eroded - estimated 90 km (56 mi) diameter impact crater?
Which is the world's largest single-drop waterfall by volume and among the tallest and most powerful waterfalls in the world?