I just returned home from my new favorite cycling destination: South Korea. I spent a week biking the country’s Four Rivers Bike Path, an impressive network of world-class cycling infractructure that spans more than 1,000 miles. Look for my story in the August issue of National Geographic Traveler. I’m  fairly certain there’s nothing else like these bike paths on Earth. You can replicate my trip this fall with Bike Tours Direct. For May and June, I’ve got four trips lined up, including one to Chamonix, which has been on my bucket…