Mt. Baker Ridge Sunset Stones

Each solstice, students and astronomy enthusiasts gather at a primitive but functioning sun wheel to witness how humanity first used this calendar.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

This suburban British town holds secrets that would have made the druids proud.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A massive line that stretches across the floor of Bologna’s largest church was created by a 17th-century scientist to measure the movements of the Sun.

These Neolithic burial mounds and a still-intact passage tomb may have solar calendar significance on the spring and autumn equinoxes.

This metal installation is a tribute to an ancient megalithic structure and South Yorkshire's steel history.