The historic stone bridge over the Perłowska River was built in 1891 according to the design of Czech architects Václav Prošek and Adolf Kolář. It has the form of an arch with a span of 15.8 m. On both sides of it there is a richly ornamented cast iron balustrade measuring 10 lengths. There is a plate engraved with the date of completion of the bridge construction.
At the ends of the balustrade there are four stone pillars, about 7 m high. They are decorated with geometric ornaments and topped with stone spheres. Each ball has a statue of an eagle with outstretched wings. The birds seem to have just landed and are looking around to guard the road underneath them. Four identical sculptures are made of bronze and symbolize freedom. They give the bridge its name.
There is a small monument in the vicinity of the bridge. It commemorates the return to the city of the Bulgarian refugees released from Ottoman captivity in 1878. Their meeting with the townspeople took place where the bridge is now located.
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