Muslim :: Book 40 : Hadith 6782
Abu Huraira reported Allah's Messenger (may peace be upon him) said that Allah, the Exalted and Glorious, said: I have prepared for My pious servants which the eye has seen not, and the ear has heard not and no human heart has ever perceived such bounties leaving aside those about which Allah has informed you. He then recited:" No soul knows what comfort has been hidden for thein".
Muslim :: Book 40 : Hadith 6805
Abu Bakr b. Abdullah b. Qais reported on the authority of his father that Allah's Messenger (may peace be upon him) said that in Paradise there would be a tent made of a single hollowed pearl, the breadth of which would be sixty miles from all sides and there would live a family in each corner and the other would not be able to see the believer who goes around them.
Muslim :: Book 40 : Hadith 6813
Abu Huraira reported: We were in the company of Allah's Messenger (may peace be upon him) that we heard a terrible sound. Thereupon Allah's Apostle (may peace be upon him) said: Do you know what (sound) is this? We said: Allah and His Messenger know best. Thereupon he said: That is a stone which was thrown seventy years before in Hell and it has'been constantly slipping down and now it has reached its base.