In 1996, American artist James Turrell designed the Celestial Vault to showcase the sky in all its glory using an innovative astronomical optical illusion. In the centre of this grassy artificial crater, there is a stone bench on which visitors can lie to observe the sky as a curved dome, emphasising the way light affects how we perceive things and inviting those willing to challenge their own perceptions.

One of, if not the most important centres for justice and peace in the world, Peace Palace comprises the United Nations International Court of Justice, the Permanent Court of Arbitration, the Hague Academy of International Law and the Peace Palace Library. Although this is a working palace, which means most areas are closed to the public, there is, however, a visitors centre where those interested can learn more about the history of the palace and the role it plays today in international justice via a free audio tour. On rare occasions, the palace opens its doors to the public for guided tours, but it is advisable to check well in advance if any dates are available as they are few and far between. In any case, the impressive surrounding gardens and Neo-Renaissance buildings are definitely a must-see.

The Museo de la Memoria y los Derechos Humanos illustrates General Augusto Pinochet's 17-year dictatorship over Chile that resulted in the murder of thousands of Chileans. The museum contributes to the reworking of the period between 1973 and 1990 and at the same time, honours the many victims of the Pinochet rule. It stands as a landmark for the creation of cultural awareness and educates about the terrors of dictatorship.