The historic town centre with the castle is well preserved and is protected by law as an urban monument zone.

The highest point is the hill Kamenický kopec at 436 m (1,430 ft) above sea level.

The southern part of the municipal territory extends into the Kokořínsko – Máchův kraj Protected Landscape Area.

Under the fortress were two villages, Czech and German, which shared a church and which soon merged into one settlement.

[3] During the Thirty Years' War, Zákupy was looted and damaged several times (in 1621, 1634 and 1639) by various armies.

The estate was acquired by the Imperial field marshal Julius Henry of Saxe-Lauenburg in 1632.

Archduke Franz Ferdinand of Austria and Countess Sophie Chotek of Chotkov were married there on 1 July 1900.

In October 1938, the region was annexed by Nazi Germany, as a result of the Munich Agreement, and was incorporated into the Reichsgau Sudetenland.

Main landmarks of the square are pseudo-Gothic town hall from 1867 and Baroque plague column with the statue of Holy Trinity from 1708.