The peaceful English manner gardens around the Villa Borghese are a great place where you can escape the bustle of the city. The gardens include several villas (apart from the Villa Borghese there are also Villa Giuliana or Villa Medici) and even a replica of the famous Shakespeare’s Globe theatre (which was built here in 2003).
Villa Borghese is definitely worth visiting as well since it is home to Galleria Borghese which includes works of Bernini, Da Vinci or Tizian.
The admission to the Borghese Gardens is free but if you want to visit the villa, there is an admission fee.
Coordinates 41°54'52.36" N 12°29'3.365" E