Lost & Found is a monthly artist salon held in one of the medieval towers of the Waag on the Nieuwmarkt. In the room where Rembrandt's 'The Anatomy Lesson of Dr. Nicolaes Tulp' once took place have since 1997 over 80 sessions of stray images and sound been organized. Artists show material which doesn't fit comfortably into regular gallery contexts; work which demands more concentration than the usual walk-by. Check the Lost & Found website for dates & times.

Under the city, the extraordinary Gesamtkunstwerk by Louis van Gasteren, Jan Sierhuis and others is located in Nieuwmarkt underground. This is one of the public artworks of the Seventies and early Eighties endangered due to station renovation on the Underground Eastline. At present there is a notice hanging at different spots on the wall: ‘‘This artwork has been temporally removed due to renovations”.

A few years ago I had a conversation with a staff member from Uytenhaak Architects about concealed texts in Amsterdam, relating to my own work ‘stoned forever’, which is integrated in brickwork in the Olympic Quarter. He said that there is a text in Morse code incorporated into the Droogbak (1989), a residential building by Uytenhaak: ‘Deze muur staat er niet’ (‘This wall isn’t here’). It is located close to the railway line. Rudy Uytenhaak later told me that this was his last opportunity to protest against the acoustic fence that had to be constructed for bureaucratic reasons.

The fence around De Nederlandsche Bank on the Frederiksplein is a true optical experience. While passing the building, a rhythmic, dynamic pattern appears and disappears in the trellis of the fence. The figures on the sides of the rails were designed in 1992 by artist Peter Struycken, a pioneer in the area of environmental art and generating computer-program based image, light and colour compositions.

Located under Q-Park, Waterkant is ideal for sunny days since you can get direct sunlight until late evening. Grab a beer and a table on the terrace and enjoy sunny Amsterdam while it lasts. Note: if you get a bit tipsy you think you see a double Guggenheim