Militants have gone to great lengths to evade capture and battle — including dressing as women.

New Zealand's Champagne Pool, a hot spring in a region notorious for volcanic activity, is hiding a scary secret just below it's surface.

These vivid images reveal how the French Resistance fought back against the Nazis and helped make France free once more.

Even rehearsals for our favorite ballets and broadway acts make for stunning photos.

The state is considered a hub for progressive thought, but does history back up this claim?

Groundbreaking images of a world now long gone.

Take a photographic tour of the Harlem Renaissance, when Langston Hughes, Duke Ellington, and W.E.B. DuBois revitalized Black America.

15 snapshots of New York City before Uber, smartphones and hordes of tourists.

This was Brooklyn before it became a haven for luxury condos and artisanal pickle shops.

Five spies, soldiers, and activists far too brave to not have a bigger place in the history books.

21 arresting scenes from the front lines of the Syrian refugee crisis.