First of all, your group has been booked into the Palace Hotel, which is conveniently situated in the centre of Nymegen.

conveniently 是形容词 convenient 的副词形式，convenient 意思是"方便的、便利的"。 conveniently 表示"方便地、便利地"，用来描述某事物所处的位置或安排方式给人们带来便利。