For a simple, scenic walk from Sofia, visit Golden Bridges, a famous stone-river formation on Vitosha Mountain. Walk through the pine forest on mostly gentle paths for 30–60 minutes.
Wear sturdy shoes, bring water, and check weather conditions. Vitosha can be cool and misty even when Sofia is warm. For the easiest experience, choose Golden Bridges and avoid the Boyana Waterfall trail after heavy rain.