A wonderfully flat cycle path runs along both sides of the Danube between Vienna and Melk, passing through Krems, Dürnstein, Weissenkirchen and Spitz on the northern bank. Many hotels and Pensionen (B&Bs) are geared towards cyclists and most towns have at least one bike-rental and -repair shop.
For more information, pick up a free copy of The Donauradweg – Von Passau bis Bratislava (from tourist offices or as a PDF download from http://brochures.austria.info), which provides details of distances, hotels and tourist information offices along the entire route.
A popular way of exploring the region is by boat, particularly between Krems and Melk (through the Wachau); it’s also possible to travel from Passau (in Germany) to Vienna. The most convenient time to take a boat trip on the Danube is between May and September, when boat companies operate on a summer schedule. Children receive a 50% discount.
Brandner Services the Krems–Melk route one to two times daily from mid-April to late October; stops include Spitz.
DDSG Blue Danube Operates boats between Krems and Melk, stopping in at Dürnstein and Spitz, from April to October. Bikes can be taken on board all boats for free.
The roads on both sides of the Danube between Krems and Melk, where the B3 and the B33 hug the contours of the river, lend themselves well to touring. Bridges taking motor vehicles cross the river at Krems (two crossing points), Melk, Pöchlarn and Ybbs.
Direct trains from Franz-Josefs-Bahnhof in Vienna to Krems are the easiest way into the valley. Trains from Vienna’s Westbahnhof direct to Melk go via St Pölten and don’t follow the Danube Valley. There is a seasonal rail service between Krems and Dürnstein but this doesn't run often enough to be of much use. Most travellers take the hourly buses between the two towns that hug the Danube all the way.