Naturalist Terry Tempest Williams reflects on a mystery left behind by her late mother, and explains her drive to speak out on behalf of the rugged Utah wilderness she calls home. Then a tour guide from Italy describes how he likes to get away from it all: on a motorbike across the vast Sahara desert.

Extend your vicarious travels beyond the solar system by listening in as the head of NASA's New Horizons project describes his mission to explore beyond Pluto. Then learn about the world's craziest tidal action, and the "celestial dance" that causes it, from a marine conservationist. And hear from English tour guides about their favorite experiences in London’s many inviting parks and gardens.

To celebrate King's Day in the Netherlands, tour guides for Amsterdam join us to recommend strategies for enjoying this scenic city on foot. Then the author of "Explore Europe on Foot" makes the case for exploring Europe via its long-distance hiking trails — at your own pace and away from the crowds. And listeners get Rick's advice on their summer vacation plans.

Find out why Oslo has proudly been declared 2019's "European Green Capital." Then hear all about England's most beautiful and historically important cathedrals, from Canterbury's to the York Minster. And get a taste of the comfort foods you can savor in Slovenia, where the culinary influences of neighboring countries add variety to the menu.

As National Parks Week approaches, a guidebook author joins us to share ideas for exploring America’s 59 national parks. Then tour guides to France help listeners plan their summer voyages, with advice for marking the 75th anniversary of D-Day in Normandy, and enjoying a "babymoon" in Paris. Plus, the author of "Sea People" tells the fascinating story of how Polynesians came to populate the most far-flung islands on earth. 

We'll hear some of the ways the Netherlands — a country that can’t afford time to argue about climate change — is protecting its citizens from steadily rising seas. Then international-affairs professor Nina Khrushcheva, great-granddaughter of Nikita Khrushchev, tells us what she learned about her motherland when she traveled to towns in all eleven of its time zones, with a focus on understanding the Russian heartland’s strong support for Vladimir Putin. 

A musician from Orvieto provides examples of the different styles of folk music you can enjoy across Italy, then a British ex-pat tells us what it's like to live in Switzerland — and explains why the Swiss are deliberately different from the rest of their European neighbors. And one of the top Welsh tour guides shares pointers for fun things to explore on a weekend in Wales.

Best-selling author Frances Mayes tells us about her favorite uncrowded corners of Italy, away from the crush of Italy's top tourist destinations. And we'll get a personal take on the current political scene in Hungary, Poland, and Turkey, where conservative populism has changed and challenged these countries' democratic structures.

Hear how the Irish language, once banned by English colonial rulers, has re-assumed its place at the heart of Irish identity. Then listen in as musician Kieran O'Hare explains why he finds Irish bagpipes more pleasing than the better-known Scottish ones, and plays a few traditional tunes on the Irish tin whistle. And eavesdrop on a pair of Irishmen from opposite ends of the island as they share a beer and a little banter with Rick.

A flamenco enthusiast from Sweden explains her lifelong passion for the fiery dance traditions of southern Spain. Then writer Will McGrath tells us what he learned from his neighbors while living in southern Africa's small mountainous nation of Lesotho. And Rick checks in with listeners to hear how the mistakes they've made as travelers became openings to connect with local culture.