From April to November join Free Boyana Hiking Tour spending a day of amazing hiking to the Boyana church, lake and waterfalls. Tour starts at 11:00 from National Theater Ivan Vazov. No reservation needed, just show up 10 minutes before a tour. (Round transfer from the meeting point to the area - 5 EUR per perosn).
Picture from www.sofiagreentour.com
If you visit Sofia from sometimes between April and November you are invited to join Free Bike Tour. No registration required.
Picture from Sofia Green Tour.
Free walking tour in Sofia expects its guests twice a day every day at 11:00 and 18:00. A tour is both fun and educational, the perfect introduction to the city and its thousands of years of history. Starting point is from Palace of Justice, no reservation required.
City Garden in Sofia is located between Sofia Art Gallery and National Theater and is a beloved place for retreat and entertainment. In summer time you can enjoy here open air concerts, street musicians and various activities, incuding wathcing or playing chess.
The main entrance of Presidency is guarded by soldiers dressed in 19th century red and white parade uniforms. The changing of the guard takes place every hour throughout the day from 8 am to 8 pm.
Sofia Sveta Gora is a group of 14 monasteries, originated as one spiritual complex under common governance during the Second Bulgarian Empire and situated in the field of Sofia and the surrounding plains.
Image by http://svetagorasofia.bg.
Every Thursday at 20:30 over 200 riders cycle in a social night on Sofia’s streets. For more information check a web page (ony in Bulgarian). Meeting point is at the Ariana Lake. From the same place every Sunday at 11:00 starts free social event Sunday on Bicycles riding over 20km through the greenest parts.of Sofia.