Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.