This photograph of one of the two spires rising above the Oregon Convention Center in Portland, Oregon, was made on one of the first pleasant days of the spring of 2012. The twin spire towers provide light into the building’s interior and house the world’s largest Foucault Pendulum. The Foucault Pendulum is a simple device that demonstrates the rotation of the Earth.

Discover more inspiring photos like this one.

Download the FREE 500px app Open in app