You may have stood in line to see the Statue of Liberty’s crown or snapped a picture outside the White House gates. But there are parts of these places you’ll never see. A ladder inside Lady Liberty’s torch that hasn’t opened since 1916. A vault behind Lincoln’s face at Mount Rushmore. A mountain in Pennsylvania built to survive a war. No ticket, no membership, and no amount of pleading will get you past the guards. Here are 10 hidden corners of famous landmarks, and why they stay locked.