Waterfalls, Canyons and Caves

What this quiz asks

• Niagara Falls is made up of three waterfalls. Which is the largest, lying mostly on the Canadian side?
• Victoria Falls is known locally as Mosi-oa-Tunya. What does that name mean?
• The Iguazu Falls lie on the border between Argentina and which other country?
• In a cave, stalactites grow up from the floor and stalagmites hang down from the ceiling.
• Antelope Canyon, the narrow slot canyon famous for beams of sunlight falling inside, is in which US state?
• On bright full-moon nights, the spray of some great waterfalls shows a pale version of this. What is it called?
• The Waitomo Caves in New Zealand are famous for ceilings lit up by what?
• The Blue Grotto, a sea cave filled with shimmering blue light, is on which Italian island?
• Select ALL of these waterfalls that are in Iceland.
• Is Mammoth Cave in Kentucky named after the fossil mammoths found inside it?
• The Fish River Canyon, one of the largest canyons in Africa, is in which country?
• Fingal's Cave, on the Scottish island of Staffa, is lined with tall six-sided columns of basalt.
• The Verdon Gorge, often called Europe's Grand Canyon, is in which country?
• In which year did a British and Vietnamese team first explore Son Doong, one of the largest cave passages on Earth?
• Visitors to Postojna Cave in Slovenia travel deep inside it aboard what?
• Select ALL of these caves that are famous for their prehistoric paintings.
• Order these waterfalls by height, tallest first.
• Which great river roars through Tiger Leaping Gorge, one of the deepest river canyons in the world, in south-west China?
• Colca Canyon in Peru is a famous place to watch which huge bird soaring on the morning air?
• Eisriesenwelt, a vast ice cave whose name means 'World of the Ice Giants', is in which country?