Underground

More than a year after a devastating eruption in the Canary Islands, a team is exploring a braided network of still-hot lava tubes.

And justified the most extreme responses.

This fallout shelter beneath a West Virginia resort was a state secret until 1992.

How a renovation project in Turkey led to the discovery of a lifetime—a lost city that once housed 20,000 people.

Ítala Fulvia Villa oversaw the building of the colossal Sixth Pantheon—but history nearly erased her contributions.

Beneath the streets of London, a secret subway for snail mail.

Where an escaped prisoner is said to have spent years in hiding.

A light show, courtesy of a historic New Jersey mine.