There are well-maintained cycling paths to Luxembourg, Diekirch, Vianden, Wasserbillig, Trier (GER) and Bitburg (GER). Bikes can be rented at many locations throughout the Mullerthal region. Perhaps the best place to rent is near the Youth Hostel by the Lac d'Echternach.
The Basilica's crypts are the final resting place of Northumbrian missionary Saint Willibrord, who died in Echternach in 739. The crypts can be visited for free. In the crypts you will find the chest with the body of Willibrord inside, as well as the Willibrord well, the water of which is believed to cure skin diseases.
Musée de l'Abbaye
The Abbey is a museum of the catholic past of the city. It's worth a visit.
Shows the remains of an ancient Roman house.
The Lac d'Echternach (Lake of Echternach), is an artificial lake. You can walk around the lake in approximately 150 minutes. Bikes can be rented at the Youth Hostel.
Musée de prehistoire et de la faïencerie d'Echternach