Worth a DetourNatureNational parksCavesWorld Heritage

Mammoth Cave National Park

Kentucky

The world's longest known cave system, with over 400 miles mapped beneath Kentucky's hills, a World Heritage Site.

Photo: Willis Thomas Lee · Public domain

People have explored Mammoth Cave for 4,000 years. Stephen Bishop, an enslaved guide, mapped much of it in the 1830s and 1840s.

Ranger-led tours range from easy walks to crawling expeditions.

Best Time
Year-round
Time Needed
1 day
Cost Level
$$$$
Open
Every day except December 25
Getting There
About 90 minutes from Nashville or Louisville.

What to See

1 of 3 are free
2 hours

Historic Tour

Past old saltpeter mining works and through Fat Man's Misery.

2 hours

Domes and Dripstones

A tour of the cave's beautiful formations.

Free2 hours

Green River

Canoeing and quiet hikes above ground.

Know Before You Go

  • The cave is a cool 54°F all year, so bring a jacket.
  • Tours sell out in summer.
  • There's a shoe wipe to protect bats from white-nose syndrome.

Where to Stay

Stay at the park's lodge, or in Bowling Green.

Where to Eat

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Last checked 2026-11-01. Part of the Southeast list.