A German journalist shares some timely thoughts on what his fellow citizens find appealing about America, as well as his insights into the intriguing differences between our two societies. Then a London "mudlarker" who searches the River Thames at low tide for buried objects describes how discarded items can connect us with life in the Victorian era, and even as far back as Roman times.

A Dutch guide invites us to imagine a day on the water exploring Amsterdam's iconic canals. Then a historian shares what little we know of the elusive Sentinelese — likely the most isolated, least contacted people on earth — and what he learned by traveling to nearby islands in the Bay of Bengal. And a tour guide from Portugal tells us why the venerable university of town of Coimbra is such a delight to explore.

Celebrate Earth Day by considering the ways you can address climate change at home, with practical advice from a scientist who's seen its effects around the world. Then hear from a culinary historian about the crops, farm animals, and agricultural traditions that we risk losing in America. And mark Shakespeare's birthday by learning how his works have played a key role in shaping Africa's newest nation and by getting tips for enjoying a visit to his hometown of Stratford-upon-Avon.

We admire the seafaring prowess of the Polynesians and hear how a cultural faux pas led to Captain James Cook's fateful encounter with 18th-century Hawaiians. Then tour guides from Athens and Thessaloniki recommend attractions to visit in northern Greece, and The New Yorker’s "Comma Queen," Mary Norris, explains what an appreciation for Greek language and mythology can add to your own Greek odyssey.

We learn some surprisingly useful Italian phrases from one of Italy's most popular newspaper columnists, then consider why certain places have fostered more than their share of world-changing innovations, and hear about Timbuktu's history as an important center for scholarship. Plus, we find out about the thrill of dropping in on a choir practice in small-town Wales.

A nature filmmaker and self-proclaimed "umbraphile" shares tips for viewing the next total solar eclipse, when the moon will cast its otherworldly shadow on a narrow band across North America on April 8 — and explains why he thinks it’s worth a trek to the totality zone. Then the "Paddle Pilgrim" returns to tell us about the unexpected challenges along his month-long Southeast Asian adventure kayaking down the Mekong River, where he was forced to learn to "linger with the lotus." And Cecily Wong from Atlas Obscura describes some of the strangest potions and fermented foods concocted before the era of refrigeration.

An American expat in Oslo shares some of the quirks and customs of life in his adopted home. Then, a wilderness and history author recounts what he found exploring four blank spots on the US map. And an ethnobotanist describes the healing properties of different kinds of herbs around the world — some of which might be growing in your own backyard.

In this all-Irish hour, tour guides describe some of the intriguing sights you'd encounter on a walking tour of Dublin and explain why the rugged Aran Islands, off Ireland's west coast, are such an exciting place to explore Irish traditions. And author Timothy Egan delves into the legacy of 19th-century America's most famous Irish immigrant.