Which opera house celebrated its 40th anniversary on the 20th of October 2013?
What would you find in a moat?
Which of these is related to a castle?
What is the name of the big buildings that the old Egyptians built?
In which country can you find many pyramids?
What did the Egyptian Pharaos build the pyramids for?
Which is the biggest palace in the world still in use by a head of state?
How many bathrooms will you find in Buckingham Palace?
How long is the Great Wall of China?
According to an often recited myth, which building structure can be seen from the moon?
Why did the Chinese build the Chinese Wall?
How long is the Trans-Siberian Railway that goes from Moscow to Vladivostok?
How high is the Eiffel Tower?