I haven’t heard much fanfare about it, but I recently learned that a cycling route between London and Paris opened over the summer. L’Avenue Verte is a 406 kilometer (252 mile) low- to no-traffic itinerary linking the two capitals (via the Dieppe-Newhaven ferry; they haven’t figured out biking on water yet!)
The route winds through a changing landscape of pretty villages and past picturesque chateaus. On the French side, the shortest line runs from Paris to Dieppe, with part of the trip following the old Paris-Dieppe railway line. An alternate option passes through the Oise Valley toward Chantilly and Beauvais before heading to the Normandy coast.
The British side uses small paths already in place from the National Cycle Network allowing riders easy access through the English countryside. The former railway lines on this end include the Forest Way and the Cuckoo Trail. The ferry from Dieppe to Newhaven takes about 4 hours and allows bikes (with a “bicyclette” fee).