If you will be in Malta in bad weather, visit to the Malta National Aquarium with the Mosta Rotunda and have a walk along the Bugibba cliffs.
Rabat and Mdina already impressed me on my last visit to Malta. Now I visit their biggest Christian monument, the Cave of St. Paul
The Colosseum and the Forum Romanum are two of the most overlooked monuments of ancient Rome, attracting hundreds of thousands of tourists.