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Photo: Gerard Dukker, CC BY-SA 4.0 via Wikimedia Commons
Just inside the arched gateway to the Amsterdam Museum is a hidden passageway with fifteen enormous 17th-century paintings; entrance is free to the public during museum hours. The collection features massive and meticulously realistic portraits of wealthy citizens from the Dutch Golden Age, the same class of subjects Rembrandt depicted in the most famous of Civic Guard paintings, the "Night Watch".
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A museum about the history of Amsterdam.
The Amsterdam Dungeon is a horror tour through several dark chambers with live actors.
The Begijnhof is a late medieval enclosed courtyard with the houses of beguines (Roman Catholic women living in a semi-religious community). It is a very picturesque group of historic buildings, mostly private dwellings. House number 34 is the oldest home in Amsterdam. The courtyard also has a Reformed Church and a hidden Catholic chapel. Surprisingly, it feels like a serene oasis as it is surrounded by the chaotic Kalverstraat and Spui. Entry to the courtyard and surrounding gardens is free, but be careful not to disturb the local community still living here.
The Allard Pierson Museum is the archaeological museum of the University of Amsterdam. The ancient civilizations of Egypt, Cyprus, the Greek world, Etruria and the Roman Empire are revived in this museum. Art objects and utensils, dating from 4000 B.C. till 500 A.D. give a good impression of everyday life, mythology and religion in Antiquity.
The well-known franchise of wax museums also has a branch in Amsterdam. It's a major tourist attraction so expect a steep entry fee and long queues. Unique to this branch are waxworks of famous Dutch people including Willem-Alexander, Beatrix, Tiësto, Rafael van der Vaart, Doutzen Kroes, Vincent van Gogh and Rembrandt.
You'd think one museum about torture would be enough, but no, not in Amsterdam. However, this was the first torture museum in the city centre, and is at least somewhat more authentic than the copycat. The museum depicts the history of different torturous techniques used over the centuries. The lighting is bad, the corridors are small and the price an absolute rip-off. You can walk through it in 15-30 minutes.