The Belgrade Fortress
There's no way you can leave Serbia without viewing the majestic Belgrade Fortress. It was built as a defensive structure overlooking the Sava and the Danube rivers during the 2nd to the 18th century. The fortress, during the mentioned period, has been rebuilt several times due to armed conflicts from the Goths and the Huns to the Avars and the Slavs, and to the Austro-Turkish war. Now, it's maintained as a museum depicting the history of Belgrade. The whole complex is made up of the fortress itself divided into Upper and Lower Town, and the Kalemegdan Park, Belgrade's most beautiful and largest park.
In the town of Topola, Oplenac is a hill where you can find St. George's Church and the Mausoleum of Karadjordjevic dynasty on top of its rocky terrain. The complex, also known as Oplenac Church and Oplenac Mausoleum, is one of the most historic sites in Serbia housing the tombs of Karadorde (founder of modern Serbia), King Peter I, and 26 of the six generations of the Karadjordjevic dynasty. The church features five spectacular domes, white marble exterior, and interiors filled with mosaic frescoes of sixty Serbian monasteries.
Nature Park Mokra Gora
Mokra Gora is a nature lover's paradise offering great views around the rich green valley in western Serbia. It is located between the mountains of Tara and Zlatibor containing several attractions such as the attractive gorges of the rivers Beli Rzav, Crni Rzav, and Kamiska Reka, the Bele Vode Spring, and the Drvengrad - 'Wooden Town' ethnic village. The nature park is home of 700 plant varieties and 60 registered bird species.
To add more creepiness to your trip, visit Cele Kula and interact with its famous residents - skulls. Cele Kula, which means Skull Tower, was created in 1809 by the Turkish General Hurshi Pasha in Nis, Serbia. The skulls that decorate the tower belong to the defeated Serb rebels during the course of the First Serbian Uprising against the Ottoman Empire. They are arranged in 56 rows with 17 skulls in each row and the skull of the rebel commander Stevan Sindelic placed on top.
The spiritual, cultural, and educational center of Serbia for over 200 years, Sremski Karlovci is a city surrounded by the preserved baroque and neo-classicist buildings and centuries of Serbian history and culture. Walk around, experience its baroque ambiance with its churches and cultural attractions. Karlovci is also known as one of the most prominent spots of Serbia's Wine Route so don't miss the wine cellars around the town.
St. Sava Temple
The first Serbian archbishop Saint Sava was born in the 12th century and is given credit for uniting Serbia and other Balkan kingdoms, creating long-standing peace in the region. The gorgeous domed structure was erected in his honor, allowing Sava's spirit to live on and to spread his important values.
On the banks of the Nisava River, in the city Nis, stands the irregularly shaped Nis Fortress. The 18th century fort was built upon a medieval foundation and served as a crucial point for Turkish control of the area. Four large gates give access to critical routes that lead to Istanbul, Belgrade, Vidin and the Nisava River itself.
Resava Cave lies in eastern Serbia in the region of Gornja Resava. It is known to be one of Serbia's oldest caves with an age of about 80 million years old as its formation had began before the Great Ice Age. The cave is 4.5 kilometers long and about 800 meters of it is accessible to visitors.
Natural rock towers can be seen in the southern part of Serbia. This area is called Djavolja Varos which translates to Devil's Town and its name surely does match its creepy weird look. These 202 towers are formed due to centuries of erosion which is similar to how the formations in Cappadoccia, Turkey were created.
Stop at the mountain village of Sirogojno located on Mt. Zlatibor to experience traditional Serbian life outside the city. The rustic setting is composed of wood-planked houses and structures, including a dairy, a bakery and an inn. People in this village pride themselves on their local crafts of pottery, knitting and mosaics; take a class on each and create your own unique souvenir.
Uvac Special Nature Reserve
Special nature reserve "Uvac" is a protected natural resource of great significance, natural resource of the First category. Situated in one of Serbia's most picturesque settings - the Uvac River valley - the Uvac Special Nature Reserve is home to 104 species of birds of which the Eurasian Griffon - one of two remaining types of vultures - now reside. Another of the reserve's unique features is the Uvac Canyon and its majestically meandering river valley. Here, you will find numerous caves varying in size from cavelets to the largest cave system yet to be discovered in Serbia - the 6,185 meter long Ushac cave system. This system boast a wealth of natural cave ornaments, from stalactites, stalagmites, and columns.