2 Best Sights in Echternach and Little Switzerland, Luxembourg

Echternach was founded in 698 by St. Willibrord, who came from Northumbria. He established a Benedictine abbey, which thrived until it was razed during the French invasion of 1794. It was rebuilt twice thereafter: first in the 19th century, and then again after it was destroyed in World War II. All the while, the relics of the saint remained safe in the crypt. Beneath the carving of the tomb's neoclassical marble canopy, you can still glimpse the simple tooled stone sarcophagus cut in the 7th century. 

On a hill just behind the basilica, a church stands on the remains of a Roman castellum and shows, in its spare architecture, signs of Merovingian, Romanesque, and Gothic influence. Hour-long private tours (€60) of it can be booked at the tourism office.