Even today, the former Reichsparteitagsgelände (Nazi Party Rally Grounds) in the south of the city is still home to gigantic ruins representing the Nazi regime’s deluded notion of grandeur. The 11 km² complex was where the Nazi Party orchestrated its propaganda campaign. The documentation centre is located in the north wing of the Kongresshalle, which was designed by the Nazis to hold 50 000 people and was never completed. The permanent “Faszination und Gewalt” (“Fascination and Terror”) exhibition housed in the 1300 m² venue, chronicles the causes, relationships and consequences of the Nazi dictatorship.

The National Museum has a display of interactive exhibits that reveal the fascinating history of the Arabian peninsula and the introduction of Islam. The museum takes you through the stories in a chronological fashion with help of movies, artefacts and maps.

The Arecibo Observatory was the world's largest radar radio telescope for over 60 years, until in 2016 a larger one was constructed in China. It was operated by the National Astronomy and Ionosphere Center of Cornell University for many years, and today makes for a great visit for science enthusiasts.