The central site of the town, the market square Plac Towarzystwa Jaszczurczego, is named after the Lizard Union (an organization of Prussian nobles and knights). The name was given in 1961 on the initiative of Ziemowit Maślanka, a social guardian of monuments, history teacher and honorary citizen of the town who proposed the name on the occasion of the 550th anniversary of the death of Nicolas von Renys (Mikołaj z Ryńska), one of the four founders of the Lizard Union (Towarzystwo Jaszczurcze), which was established on 24th February 1397 in Radzyń Chełmiński.

The glacial erratic can be found between the town and the castle, near Struga Radzyńska (the Radzyń Stream). It weighs around 3.5 tons. A circle carved in stone visible on its surface depicts a coat of arms of Radzyń Chełmiński and contains a date “1593”.
This date probably refers to the privilege for small royal towns issued by the Polish king Zygmunt III Waza (Sigismund III Vasa) on 12th April 1593. The privilege aimed to contribute towards the improvement of the financial situation of such small towns.

The monument was erected in 1966 to commemorate the Second World War victims and Nazi martyrs from Radzyń Chełmiński and its neighbourhood. The monument is situated at Towarzystwo Jaszczurcze Square (The Lizard Union Square).

The Synagogue was built at the end of the 19th century and until 1920 it served as a place of worship. In 1945 the abandoned building was converted into a dwelling house.
Made of brick, unplastered synagogue was erected on a rectangular plan. A unique in synagogue construction external gable décor with blind windows filled with plate tracery has preserved until now.

Saint George’s Chapel is located in the south-western part of the town in Kazimierz Jagiellończyk Street. It was built around 1286 as a wooden structure. In the Middle Ages there was a church with a shelter for the pilgrims and homeless people in the place of the present chapel. The present Saint George’s Chapel was built of brick in the Gothic style around 1340. From that time on it serves as a cemetery chapel while in the 19th century it was used as a storehouse.

The monument was erected in 1982 to commemorate an event which took place a hundred years earlier. During the years 1871 – 1873 Wojciech Kętrzyński was staying in Pomerania discovering some valuable archival materials in Radzyń Chełmiński, Golub and Chełmno. From his discoveries he gathered materials which he used later in his work “O ludności polskiej w Prusiech niegdyś krzyżackich”, printed in Lviv in 1882.

The monument was made by Ziemowit Maślanka in 1985 and located in the eastern edge of the town to honor all the people who were deported in that direction. From the front view the monument resembles an upside down heart and from the side it looks like a narrow-gauge railway, which was used in taiga to transport wood cut down by the convicts.

The monument was erected in 1980 in the five-hundredth anniversary of the death of Jan Długosz, a famous Polish chronicler who recorded extracts from the history of the town in his Annals or Chronicles of the Famous Kingdom of Poland (Annales seu cronici incliti regni Poloniae). He described there how the castle and the town were conquered by the armed forces of the Polish king Władysław Jagiełło in September 1410.