Marble walls as white as milk, lined with skin as soft as silk, in a fountain crystal clear, a golden apple will appear, there is no key to this stronghold, yet theives break in and steal the gold. What is it?

Answer: An egg.

More Classic Riddles with answers

More Classic Riddles

Mary's father has five children. They are Nana, Nene, Nini, and Nono. What is the fifth childs name?
Mountains will crumble and temples will fall, and no man can survive its endless call. What is it?
My first is a fluid, my second a solid, my whole a plant. What is it?
My first is a negative greatly in use, By which people begin when they mean to refuse; My second is Fashion, or so called in France, But, like other whims, is the servant of chance. An article always in use is my whole, With texture and form under fashion's control; But, alas! not a thing can it see which goes by, Although many have four sights, and all have one eye. What am I?
My first is a part of the day, My last a conductor of light, My whole to take measure of time, Is useful by day and by night. What am I?
My first is a very uncomfortable state, In cold weather it mostly abounds. My second's an instrument formed of hard steel, That will cause the stout foe to stagger and reel, And when used, is a symptom of hate. My whole is an author of greatest renown, Whose fame to the last day of time will go down. Who am I?
My first is appropriate, my second 'tis nine to one if you guess it. My whole elevates the sole above the earth. What am I?
My first is found on the ocean wave, In the spring, the pit, and the mine; My second below earth's surface you have, Where seldom the sun can shine. My whole your dinner-table must grace, And seldom fails to obtain a place. What am I?
My first is in chocolate but not in ham, my second's in cake and also in jam, my third at tea-time is easily found, my whole is a friend who's often around. What am I?
My first may be fashioned of iron or wood, And at window or door for safety is placed; In village or town, it does more harm than good, Leading people their health, time, and money to waste. My second's a lady, bewitching and fair, And for love of her people will labor and strive; Will rise before dawn, and be wearied with care, And pursue her with ardor as long as they live. My whole is what ladies admire and approve, The shopkeeper's boast-the purchaser's prize; 'Tis a ninepenny chintz-'tis a one-shilling glove- It is something which makes people open their eyes. What am I?
My head and tail both equal are, My middle slender as a bee. Whether I stand on head or heel Is quite the same to you or me. But if my head should be cut off, The matter's true, though passing strange Directly I to nothing change. What Am I?
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe. What am I?