We hear why the city of Potsdam — home to elegant Prussian palaces and parklands, all in quick reach of central Berlin — is worth a day's visit. Then we get a sense of what life was really like for the emperors of ancient Rome, with the help of classicist Mary Beard. And we travel back to 1978 with Rick and his longtime buddy Gene Openshaw as they retrace their post-college adventures along the infamous "Hippie Trail" from Istanbul to Afghanistan to India, all the way to Kathmandu.

A tour guide from Orvieto explains why his Umbrian hill-town home is well worth a stop on your Italy itinerary. Then a rail enthusiast looks at train travel in Europe and beyond and considers how — and why — the US set off upon a different track. And a British journalist takes us along as she rides the rails on a lively journey across India.

The Grand Tour was a rite of passage for the aristocracy, and the adventuresome spirit behind it lives on in modern European itineraries. A longtime travel publisher traces the evolution of this fantastic voyage. Then Rick Steves' Europe guidebook researcher Cameron Hewitt takes a look back on the ways travel has evolved over the past quarter century. And as the Sagrada Família stretches ever closer toward completion, one of the project's architects helps us understand what Gaudí's ambitious creation means to Barcelona and Catalonia.