Author Mark Adams shares what he learned about Incan history while trekking to Machu Picchu, just a century after it was revealed to the outside world. Then author and radio commentator Sarah Vowell explains how Revolutionary War hero Marquis de Lafayette helped unify Americans after the contentious presidential election of 1824. And Rick checks in with tour guides from Edinburgh to get tips on visiting Scotland's whisky distilleries.

Rick and two French guides offer tips for planning a visit to the royal palace of Versailles and discuss contemporary issues facing France. Graphic Novelist Sarah Glidden discusses her first trip to Israel on a Birthright tour.

Photographer Marty Essen talks to Rick about his close encounters with animals in their native environments. And guides from Ireland recommend their favorite parts of Ireland to explore for people visiting this year.

Celebrate 30 years of Women's History Month in the USA by visiting sites where women changed the nation's history, recommended by a former director of the National Museum of American History. Endurance swimmer Diana Nyad tells us how she set a world record swimming from Havana to Key West. And naturalist Gary Ferguson describes the fierce nature of the wilderness.

We'll hear about the local delicacies found on the various tapa menus across Spain. Then we'll learn more about the centuries-long traditions behind Carnival celebrations in Venice and Cologne, the scene of some of Europe's biggest wintertime parties. Plus we'll listen in on the Norwegian TV show that's helped many Americans discover their old-country ancestry.

We'll take an audio stroll along the bustling banks of the Danube as it flows through the scenic heart of Budapest. Then we'll hear from some Brits about what motivated them to vote for or against leaving the European Union, and about what makes them fearful — or optimistic — for the years ahead.