Left Hand Tunnel—Carlsbad Caverns National Park
Location: southeast New Mexico
Length of visit: 2 hours
Major draws: Unlit portion of cave, historic candle lanterns
Strenuosity: 2 out of 10
Cost/Fees: $7 per person
Additional considerations: 56-degrees inside cave year round
Description: Behind the underground lunchroom (yes, they have that too) is an unlit cave passage where a ranger will point out fossil shells, aragonite crystals, and other speleothems by lantern light.