Machu Picchu: An ancient Inca city located high in the Andes Mountains of Peru. It is renowned for its impressive architecture, terraces, and stunning views.
Sundial: A device used to measure time by casting shadows onto marked surfaces using sunlight. It was widely used before mechanical clocks were invented.
Astronomy: The scientific study of celestial objects such as stars, planets, comets, and galaxies. It involves observing their movements, composition, and behavior.