Romania combines medieval Transylvanian towns, royal castles and one of the most spectacular mountain roads in Europe, and much of it combines beautifully into a single road trip. The DN1 forms the classic route from Bucharest via Ploiești and Brașov into Transylvania, but the absolute highlight lies on a side road up into the mountains.
The DN1/E60 runs from Bucharest via Ploiești and Brașov to Sighișoara and on to Cluj, forming the backbone of a classic Transylvania road trip. The Transfăgărășan (DN7C) is a stunning detour up into the Făgăraș Mountains — note that this road is generally only open from around July to October, and lies under snow outside the season.

A 14th-century castle perched on a rocky outcrop, known worldwide as "Dracula's castle" and one of the most visited sights in Romania, with turrets, courtyards and views over the Bucegi Mountains.

The Neo-Renaissance summer palace of King Carol I in Sinaia, built between 1873 and 1914, with richly decorated interiors and a dramatic setting against the Bucegi Mountains. One of the finest castles in Europe.
One of the most spectacular mountain roads in Europe, with dozens of hairpin bends climbing to Lake Bâlea at over 2,000 metres. Only open in summer and early autumn.
The second-largest administrative building in the world, built under Ceaușescu, seen from the wide Bulevardul Unirii. An impressive, somewhat overwhelming calling card of the Romanian capital.

One of the best-preserved medieval fortress towns in Europe, with the 64-metre-high Clock Tower and colourful houses in the inhabited citadel. Birthplace of Vlad Țepeș. UNESCO World Heritage Site.
This selection is a starting point. Combine it with the prices and validity periods of the Romanian vignette to complete your route.