Most of U.S. big cities don't have that much to offer in terms of historical sights, charming neighbourhoods and green parks, but Boston got it all. Though it's one of oldest cities in the U.S. (founded in 1630), the vibe is young and progressive as it is an academic hub. There are 35 colleges and universities, including the renowned Harvard and MIT. As with most U.S. cities, each neighbourhood has its own flavour; North End, Charles Town, Beacon Hill, Fenway, Back Bay and Cambridge are some of the most interesting ones. Downtown is where the Freedom Trail starts. It's a walk which takes in a selection of historical monuments and old houses. For a lazy afternoon head to the green and leafy Esplanade which runs along Charles River. In summer you can sunbathing on the pontoon on the river or just bring your own hammock, if you want some shade. Another great thing that sets Boston apart from other U.S. cities, is that it's relatively compact and have an extensive public transportation system which include subway, buses, trains, ferries, and even shared bicycles.