Program 480b: Turn Right at Machu Picchu; Lafayette in the USA; Scotch

Author Mark Adams shares what he learned about Incan history while trekking to Machu Picchu. Then author 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.

• Mark Adams, author of "Turn Right at Machu Picchu" (Dutton) and "Tip of the Iceberg" (Dutton)
• Sarah Vowell, author of "Lafayette in the Somewhat United States" (Riverhead)
• Anne Doig, Scottish tour guide based in Edinburgh
• Brian Hay, tour guide based in Edinburgh
• Liz Lister, tour guide based in Fife, Scotland

• Mark Adams wrote "Turn Right at Machu Picchu" about his attempt to commemorate the centennial of Hiram Bingham finding the site of Machu Picchu in the Peruvian Andes.
• Sarah Vowell has written six best selling non-fiction books on American history and culture. Her most recent one is "Lafayette in the Somewhat United States."
• Sarah told a conference of the American Library Association about her impetus for writing the book.
• George Washington's estate at Mount Vernon, Virginia, is managed by the National Park Service. The historical collection includes the key to the Bastille, brought from Paris by the Marquis de Lafayette.
• The website for the Scotch Whisky Association includes a map of Scotland's different whisky-producing regions and their distilleries.
• The Scotch Whisky Experience "virtual distillery" is located near Edinburgh Castle.
• Liz Lister's website.