Serbia Museum, Peaceful + Waterfall Pictures

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Straddling the shores of the Danube, this welcoming riverside city features a fascinating collection of beaches, parks, pavement cafés and religious landmarks.

Play with intriguing interactive displays for an insight into the mind of one of the most important scientists in the 20th century.

Straddling the shores of the Danube, this welcoming riverside city features a fascinating collection of beaches, parks, pavement cafés and religious landmarks.

Tour the gates, tunnels, ramparts and museum of this imposing 17th-century citadel, which hosts an annual music and arts festival.

Walk or bike across this region of rambling forested hills to visit ancient monasteries, postcard-perfect villages, tranquil lakes and vineyards.

Straddling the shores of the Danube, this welcoming riverside city features a fascinating collection of beaches, parks, pavement cafés and religious landmarks.

Walk or bike across this region of rambling forested hills to visit ancient monasteries, postcard-perfect villages, tranquil lakes and vineyards.

Tour the gates, tunnels, ramparts and museum of this imposing 17th-century citadel, which hosts an annual music and arts festival.

Play with intriguing interactive displays for an insight into the mind of one of the most important scientists in the 20th century.

Play with intriguing interactive displays for an insight into the mind of one of the most important scientists in the 20th century.

Play with intriguing interactive displays for an insight into the mind of one of the most important scientists in the 20th century.

Tour the gates, tunnels, ramparts and museum of this imposing 17th-century citadel, which hosts an annual music and arts festival.

Tour the gates, tunnels, ramparts and museum of this imposing 17th-century citadel, which hosts an annual music and arts festival.

Play with intriguing interactive displays for an insight into the mind of one of the most important scientists in the 20th century.

Play with intriguing interactive displays for an insight into the mind of one of the most important scientists in the 20th century.

Straddling the shores of the Danube, this welcoming riverside city features a fascinating collection of beaches, parks, pavement cafés and religious landmarks.

Play with intriguing interactive displays for an insight into the mind of one of the most important scientists in the 20th century.

Play with intriguing interactive displays for an insight into the mind of one of the most important scientists in the 20th century.

Tour the gates, tunnels, ramparts and museum of this imposing 17th-century citadel, which hosts an annual music and arts festival.

Walk or bike across this region of rambling forested hills to visit ancient monasteries, postcard-perfect villages, tranquil lakes and vineyards.