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Photo: Lienhard Schulz, CC BY-SA 3.0 via Wikimedia Commons
A remarkable medium-sized classical castle by the famous K.F. Schinkel built 1820 to 1824, also called "Humboldtschlösschen", because Alexander and Wilhelm von Humboldt (and their family) lived here once. Still privately owned.
The Schloss Tegel or Humboldt-Schloss is a country house in Tegel, part of the Reinickendorf district of the German capital Berlin. The brothers Wilhelm and Alexander von Humboldt spent much of their childhood in a former schloss on the site and on the estate, which extends almost as far as Lake Tegel.
© OpenStreetMap contributors
Relaxing lake-side strolls on 'Greenwich Promenaid', a path named after Reinickendorf's twin town of Greenwich, London.
Not far away from Schloss Tegel (at the "große Malche") you can take a look at the oldest tree in Berlin, an oak which has been growing there since about 1192 (so it's actually older than Berlin itself). The name ("fat Mary") allegedly stems from the brother Humboldt who named the tree after their overweight cook.