Thanks in no small part to the magazine and TV channel it lends its name to, the Smithsonian Institution has become synonymous the world over with exploration and learning. As the largest museum, research and education complex on Earth – and it's still growing – it looks after sites in Washington DC, New York and Virginia. From its fascinating foundations to its eccentric collections of Americana and arcana, we take a look at the stories and secrets behind the Smithsonian.
Click through this gallery to discover incredible facts about America's richest treasure trove, and how to visit today…