The Castle Keep in Newcastle is one of the finest of its kind surviving in Britain today. It is an ancient monument and a Grade 1 listed building. It sits upon ground previously occupied by the Roman fort Pons Aelius, an Anglo-Saxon cemetery and a Norman Motte and Bailey Castle from which the City takes its name.

Kilmainham Gaol is one of the largest unoccupied gaols in Europe. It opened in 1796 as the new county gaol for Dublin and finally shut its doors as such in 1924. Today, the building symbolises the tradition of militant and constitutional nationalism, from the rebellion of 1798 to the Irish Civil War of 1922-23. The great collection consists of a wide variety of object types, including manuscripts, photographs, newspapers, weaponry, artwork, medals, uniforms and personal effects especially related to the political imprisonment in the 1916-23 period, as well as the experience of women during the Civil War.

The Maruyama Zoo covers a vast area and has an amazing variety of animals and birds, around 200 different species. It is a great place to take children, and visit (for example) the Tropical Animal House, the Bear House or the Kid's Zoo.

Centre Charlemagne is a modern city museum in the heart of the historical centre. Here, the history of city comes to life, explaining how Aachen became the residence of the Carolingian rule and the medieval city of coronations. Apart from that, the Centre Charlemagne is the starting point of the Route Charlemagne that connects all the important places in the city.