Mammoth Cave

The Mammoth Cave National Park near Edmonson in south-central Kentucky boasts the longest cave in the world, with 350 miles (563km) of caverns and passages having so far been explored and, according to experts, 'no end in sight'. The cave has been promoted as a tourist attraction since 1861, making it America's oldest attraction, which was encompassed into a national park in 1941 to preserve the cave system and the scenic river valleys of the Green and Nolin Rivers.

The park offers camping, cave tours, hiking trails, hotel accommodation, canoeing and horseback riding. There are a variety of cave tours on offer with varying levels of difficulty and sightseeing options, run to different schedules. Visitors are advised to request a brochure and book in advance, as tours cannot be booked on the day.

Website: www.nps.gov/maca/index.htm

Telephone: (270) 758-2180

Opening times: Visitors Center: November to March 8:30am-4:30pm; March to May 8am-6:15pm. Various different tours on offer daily.

Admission: Mammoth Cave Passage Tour: $5 adults, $3.50 children 6-12. Other tours range from $10-48. Concessions available.