Question: Caves Express was named after which limestone caves?

Context paragraphs:
Tarragal Caves: The Tarragal Caves are a network of large limestone caves and rockshelters which overlook the Bridgewater Lakes near the towns of Tarragal and Cape Bridgewater, Victoria in the Charles La Trobe and are near Discovery Bay Coastal Park.  The caves were idenitifed as important Aboriginal camping places early in the historic perod, and were excavated in the late 1970s by Harry Lourandos, revealing stratified deposits in the floor of 11,300 years old, along with shell midden deposits and earth ovens over 11,000 years old.

Padah-Lin Caves: Padah-Lin Caves (Burmese: ဗဒလင်းဂူ , ] ; also Padalin or Badalin) are limestone caves located in Taunggyi District, Shan State, Burma (Myanmar).  It is located near a path from Nyaunggyat to Yebock, on a spur of the Nwalabo mountains within the Panlaung Reserved Forest.  There are two caves; the smaller of the two is a rock shelter while the larger cave comprises nine chambers connected by narrow passages in a north-south axis, three large sink holes that let natural light in, and several active speleothem formations.

Parque Nacional de las Cavernas del Río Camuy: The Parque Nacional de las Cavernas del Río Camuy (English: "Camuy River Cave Park" ) is a cave system in Puerto Rico.  It is located between the municipalities of Camuy, Hatillo and Lares in northwestern Puerto Rico, but the main entrance to the park is located in Quebrada, Camuy.  The caverns are part of a large network of natural limestone caves and underground waterways carved out by the third-largest underground river in the world, the Río Camuy (Camuy River).  The cave system was discovered in 1958 and was first documented in the 1973 book "Discovery At The Río Camuy" (ISBN  ) by Russell and Jeanne Gurnee, but there is archaeological evidence that these caves were explored hundreds of years ago by the Taíno Indians, Puerto Rico's first inhabitants.  Over 10 miles of caverns, 220 caves and 17 entrances to the Camuy cave system have been mapped so far.  This, however, is only a fraction of the entire system which many experts believe still holds another 800 caves.

Callao Cave: Callao Cave is one of the limestone caves located in the municipality of Peñablanca, Cagayan province, in the Philippines.  The seven-chamber show cave is one of 300 caves that dot the area and the best known natural tourist attractions of the province.  The town is named as Peñablanca ("Spanish for" white rocks) for the presence of white limestone rocks in the area.  Callao Cave is located in the Barangays of Magdalo and Quibal in Peñablanca about 24 km northeast of Tuguegarao City, the capital of the Province of Cagayan.

Yiyuan Rong Cave Group: Ordovician limestone caves in the area under the administration of the city of Zibo, Shandong Province, China.  Rong Cave proper (, ) is the namesake of the cave group.  It is located about 13 km to the north of the town of Tumen ().  The cave group contains more than 40 caves in total and is the largest cluster of limestone caves in China north of the Yangtze River.  It covers an area of approximately 10 square kilometers.  Other major caves in the group are Thousand-Men Cave (),

Marble Arch Caves: The Marble Arch Caves are a series of natural limestone caves located near the village of Florencecourt in County Fermanagh, Northern Ireland.  The caves are named after the nearby Marble Arch, a natural limestone arch at the upstream end of Cladagh Glen under which the Cladagh River flows.

Jenolan Caves: The Jenolan Caves (Tharawal: Binoomea, Bindo, Binda) are limestone caves located within the Jenolan Karst Conservation Reserve in the Central Tablelands region, west of the Blue Mountains, in New South Wales, in eastern Australia.  The caves and 3083 ha reserve are situated approximately 175 km west of Sydney, 20 km east of Oberon and 30 km west of Katoomba.

Cliefden Caves: The Cliefden Caves Geoheritage Site is multifaceted, containing internationally significant Ordovician fossil localities, limestone caves of national significance, a warm spring and tufa dams of state significance and the historically significant site where limestone was first discovered in inland Australia.  It has been ranked among the 70 most significant fossil sites in Australia by the Australian Heritage Council (2012) and as the thirteenth most significant limestone cave site in Australia by Davey.  The site was nominated to the Register of the National Estate by the Geological Society of Australia in the late 1970s and registered in 1987 (Place ID 958, File # 1/07/261/004).

Amboni Caves: The Amboni Caves are the most extensive limestone caves in East Africa.  They are located 8 km north of Tanga City in Tanzania off the Tanga-Mombasa road.  The caves were formed about 150 million years ago during the Jurassic age.  It covers an area of 234 km².  According to researchers the area was under water some 20 million years ago.  There are altogether ten caves but only one is used for guided tours.

Caves Express: The Caves Express was an Australian special passenger rail service that operated between 1929 to 1942 on the Blue Mountains Line in New South Wales.  The name was derived from the nearby Jenolan Caves.

Supporting paragraphs: Caves Express Jenolan Caves
Answer: Jenolan Caves