PostsCommentsPayoutsmujaffa101 (14)in #bulgaria • last yearDevetashka Cave Wow Place to See in Bulgaria 🇧🇬The Devetashka cave it is one of the biggest caves in Bulgaria. It was discovered in 1921, and in 1950s was used as oil depot. Nowadays, the cave is declared a monument of…mujaffa101 (14)in Proof of Brain • last yearAn Alternative to Listing on Google - Keyword Staking in PRESEARCHPhoto Source Until recently, while I knew of the existence of PRESEARCH, I really knew nothing about it. So with the goal of submitting an article for a competition, I started…