San Francisco

Crammed into less than 50 square miles and with a population of less than a million, small San Francisco packs a mighty punch. Its patchwork of different neighbourhoods -- Mission District, Haight-Ashbury, Chinatown and many more -- all offer a different side to the city, while the big attractions -- Alcatraz, Golden Gate Bridge and Fisherman's Wharf -- are all worth the visit.

This is also a city of culture. There are Michelin-starred restaurants. There are pop-up diners and incredible food trucks. There is a world-class music scene and plenty of outdoor adventures, from whale-watching at Land's End to hiking in Mount Diablo. Just watch out for the earth tremors -- San Francisco's proximity to the San Andreas faultline means it experiences several hundred tremors a year.