This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Step inside Lucy, the world's largest "elephant."

The first American department store, and home to the largest operating musical instrument in the world.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.