The southern part of the municipal territory extends into the Jizera Mountains and includes the highest point of Frýdlant, the hill Špičák at 724 m (2,375 ft) above sea level.

[4] The first written mention of Frýdlant is from 1278, when Rulko of Birbstein,[4] also called Rudolf of Bieberstein, purchased the castle and surrounding land from the king.

[3] Frydlant castle and town, also called Frýdlant Manor, went to Emperor Ferdinand I when Christopher, the last of the line of the Birbsteins, died in 1551.

Several new villages were established and the production of linen cloth resulted in an economic boom during the initial years of the Redern family.

[8] Christoph von Redern was considered a traitor when he opposed Emperor Ferdinand II and supported Frederick V after the Battle of White Mountain in 1620.

Frýdlant then went to Matthias Gallas, Count of Campo, Duke of Lucera as a reward for his fight against Wallenstein in 1636 by Emperor Ferdinand II.

Due to the loss of religious freedom and Protestants being forced to adopt the Catholic religion, many exiles did not return to the area.

In 2016, Georg Mederer and Erich Stenz, German treasure hunters, claimed that trucks delivered items from the amber chamber of Saint Petersburg, Russia to the castle in the late period of the war.

They state that the items previously owned by Peter the Great were stolen by the Nazis and stored in the castle cellars with contemporaneously constructed brick walls.

Frýdlant is located on two railway lines of local importance, heading from Liberec to Černousy and to Nové Město pod Smrkem.

There are exhibits, such as of Albrecht von Wallenstein, the Thirty Years' War, and an armoury of 1,000 weapons used for military and hunting.

The castle includes the Chapel of Saint Anne, the Knights' Hall, rooms for the count and countess, and a working kitchen.

[10] The Church of the Holy Cross was built in the mid-16th century by Italian architects,[8] which has a mixture of architectural styles due to construction over the years.