Mines

The world's largest man-made underground caverns offer unparalleled underwater wonders.

An abandoned guano-mining city in the South Pacific.

A fake mine that was made using real mining techniques which is also used as a community center.

1920's mining camp and environmental education center is serving to protect the surrounding forest, one of the last of its kind in the Pacific Northwest.

These picturesque ruins crumble beautifully into the ocean.

A historic coal mine that doubles as a museum and tourist attraction.

Ice roads, deep holes and 3,500 pounds of diamonds.

This former mining town was named the most toxic town in America.

The largest greenhouse in the world is home to over one million types of plants.

Mountain of unimaginable riches that bankrolled the Spanish Empire, complete with its own underworld god.

Abandoned silver mine strewn with wrecked and twisted structures.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

The world's oldest known salt mine.

The world's second-largest excavated hole.