We start with a close look at how World War I upended the roles of Europe's monarchies, then hear about Agatha Christie's 1922 Grand Tour to promote the British Empire, as told to her grandson. And, just in time for "Bloomsday," a Dublin tour guide takes us on an audio walk past the city's must-see sights for fans of James Joyce's "Ulysses."

For more information on Travel with Rick Steves - including episode descriptions, program archives and related details - visit www.ricksteves.com.