Hazrat Mahdi (as) will flatten some mountains and construct highways upon them

“Abdullah ibn Omar narrated: Our Prophet (saas) said: “Mahdi, one of my grandsons, from the lineage of Hussain, will appear from the East.” That is, it is related that Mahdi will carry out his activities in the East. If mountains face him [Mahdi], he [Mahdi] will demolish the mountains and turn them into roads.” Roads, this means that he will change them into asphalt. This means that they are awaiting their owner. Notice that it is said, “He [Mahdi] will demolish the mountains and change them into roads. Nuaim ibn Hammad v.1, p.372 and p.407, Bayan al-Shafi, p.513,Iqdud Durar, p.127, Al-Qawl al-Mukhtasar p.15, Ikha Ul Haq, c.29, p.222.This hadith exists in every hadith book. It is a known hadith. Notice that it is said, “He demolishes the mountains, turns them into roads” so that you can pass on them. And it is stated that this will happen in the East. Isn’t it very clear? 

http://en.a9.com.tr/watch/209284/Adnan-Oktarin-Sohbetl