Mammoth Cave NP - Grand Avenue Tour
The Grand Avenue Tour was our longest tour at Mammoth Cave National Park. It was 4 miles long and took about 4 hours. It was also my favorite tour of our trip. It had it all: slot canyons, tubular passageways, tall canyons, and tunnels sparkled with gypsum. It ended following the Frozen Niagra and Domes and Dripstones tour paths packed with awesome cave things to see!