A Buenos Aires building whose architecture is inspired by Dante's Divine Comedy, representing Hell, Purgatory and Paradise.
Hidden beneath a hill in central Mexico lies the world's largest pyramid.
A German map published in 1507 was the first to name the continent.
From Benin to Sardinia to the North Caucasian Emirate: curious examples of the flag-maker's art.
Where did the French, British, Spanish and Portuguese empires send their convicts?
The little-known subterranean railway will open as part of the new Postal Museum.
A marvel of the Victorian era, the Crystal Palace was destroyed in a fire on November 30th, 1936.
Can you recognise these obscure American presidents?