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Industrial heritage is not so common in Bulgaria. This former wool factory from 1891 was built by Evlogi Georgiev. His villa on the factory grounds looks like it's about to collapse. The factory is in a better shape, but it is likewise abandoned.
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Водопад Сучурум
The Stara River comes down the mountainside and forms an 8-meter high waterfall right north of the town. While it's not so that high, it is picturesque. There's a hydroelectric plant nearby driven by water from another river flowing down the mountain through pipes.
Площад 20 юли
The town square of Karlovo, named in memory of the massacre of 800 Bulgarians by Turks in the town on 20 July 1877, during the Russo-Turkish war. There's a memorial to the massacre as well. Buildings surrounding the square include an eclectic bank building, a library built during the People's Republic of Bulgaria, a city hall with a mural symbolizing space exploration and peaceful use of nuclear power.
Куршум джамия
Built by the Turkish in 1485, the mosque is the oldest building in town. Nationalized during Communism, it was returned to the Islamic community in 2014 , nevertheless it remains closed.
Национален музей "Васил Левски"
Vasil Levski was born in a building from the 18th century at this place, but the current building is a replica from 1933. The house can be admired from the outside and the interior through the windows. There's more to see in the adjacent exhibition hall; documents, objects, paintings and holograms. There's also a memorial chapel with a strand of Levski's hair and a statue of his mother.
Даскал Ботевата къща
Hristo Botev, born in the nearby town of Kalofer (where the main memorials to him can be found), was another revolutionary figure just like Levski. His home in Karlovo is also a museum, though not that impressive. The house built around 1800 was named after the nickname of his father, Botyo Petkov (Daskal Botyo, "teacher Botyo").
Мазаковата къща
The ethnographic part of the city museum is in this red house. Showcasing traditional crafts and local life in the late 19th and early 20th century, this is probably the best museum for people who are less interested in Levski and the independence struggle.