Some of the week-ends, the traffic on Prahova valley, between Bucharest and Brasov, might become a nightmare. The train is the appropriate solution. There are now some good trains, clean and cheap, run by private and public companies.
With
Softrans or
Astra Trans Carpatic and from Bucharest you would be in Sinaia, for a visit to
Peles Castle for example, in 1h30mins., while with
Regio Calatori it takes 2h15 mins. but very cheap (around 4 euros).
For about an hour, from Campina to Brasov, the views over
Bucegi,
Postavaru and
Piatra Mare massifs are simply amazing.
Bucegi Mountains
Unspoiled nature
On TRANSFAGARASAN Mountain Road to the HEART of TRANSYLVANIA