In a city famed for its green spaces, the Phoenix Park is the mother of them all. It’s so big that you could be forgiven for thinking you’re in the countryside – and that’s without factoring in the herd of will deer that roam the park. What's more, Dublin Zoo is located in the park. There’s also Europe’s biggest obelisk – the Wellington Monument – a star-shaped magazine fort, a gigantic cross and Áras an Uachtaráin, the residence of Ireland’s president.