Mile-high tropical diving in the Rocky Mountains?

A first look at Michigan's Grand Traverse Bay Underwater Preserve.

Underwater mazes, clear, rushing fresh water and natural light shows feed the urge to submerge.

Dive Log: Secret spots & must-see dive classics.

Dive Log: Secret spots & must-see dive classics.

Dive Log: Secret spots & must-see dive classics.

World's first manta ray protected area.

The best destinations, dives and deals.

East Coast divers find history hits close to home.