What is the cardiff castle made out of?

Is two seas meeting place called estuary? What boundary is found at the red sea? Are there porcupines in Mississippi? When was Lower Shavertown Bridge created? What does a 'Ticket to the islands' mean in slang terminology? The smallest of the five Great Lakes? When did they start and finish Mount Rushmore? What is the best time to go to Disneyland Florida and how busy are the rides at that time of year? What continent does the Rocky Mountains belong to? How fast around average does the Snake River flow? What was Ellis Island like in 1980? What is local tour guide? How long was the longest snowstorm? What is landlocked country near lake Victoria? What are the Advantages of the Philippines surrounded with water? What is the movement of water from the deep ocean to the surface? What is the difference between a river and a flood? When was Angel Island made into a museum? How many people were involved in the flooding of the Mississippi river? Why is San Jose so important?