Sayyiduna Abu Huraira رضي الله عنه narrates: Nabee صلى الله عليه وسلم said:

A person should not undertake a special journey to visit any other place (anticipating great reward) except the following three masajid:

(1) The sacred Masjid of Makkah
(2) This Masjid of mine (Madina Munawwarah)
(3) Masjid Al Aqsa

Sahih Muslim