Though caves often hold a fearsome reputation, they have a myriad of captivating natural features and intriguing histories. 

Caves often get a bad reputation: cold, dark, damp and uninteresting, or even frightening. In reality, caves offer snapshots of history, unusual natural structures, and examples of remarkable biodiversity. There are thousands of caves on Earth, and even more that are yet to be discovered. Each cave is unique, with specific natural formations that cannot be found anywhere else. Here are seven incredible caves to add to your list of must-see sights. 

1. Reed Flute Cave, China 

Called “the Palace of Natural Art,” Reed Flute Cave is known for its impressive stone curtains and pillars. Reed Flute Cave is located just 3 miles from downtown Guilin, China, and has been an attraction for centuries. Seventy-seven inscriptions of poems and travel descriptions can be found around the cave, and the oldest dates back to 790 A.D., the era of the Tang dynasty. There are inscriptions from the Tang, Song, Yuan and Ming dynasties, written by monks, poets, scholars and tourists from all over China. Today, the cave is lit by many multicolored lights hidden in its natural cracks and crevices, which cast a bright rainbow glow around the dark space, giving cave visitors a surreal and breathtaking experience. The cave was forgotten for years until its rediscovery in 1940, when a group of Chinese refugees stumbled upon it while fleeing from Japanese forces. During World War II, the cave’s large chamber, called the “Crystal Palace of the Dragon King,” was used as a bomb shelter. The cave regained popularity after its rediscovery at the end of the war, and was officially opened to the public in 1962. 

2. Waitomo Glowworm Caves, New Zealand 

Visitors to the Waitomo Glowworm Caves will take a trip into the past by exploring a cave over 30 million years old. The cave, located in Waitomo on the North Island of New Zealand,  is praised as one of New Zealand’s best natural attractions. It contains an underground river, towering rock formations, and thousands of shimmering glowworms. The Glowworm Caves have been an attraction for over 130 years. These limestone caves formed at the bottom of the ocean millions of years ago. Local Maori communities knew about the caves, but they were first explored in 1887 by Maori Chief Tane Tinorau and English surveyor Fred Mace. After discovering the natural beauty of the caves, Chief Tinorau opened the caves to tourists in 1889. Many of the guides for tours today are descendants of Chief Tinorau. Guides take visitors on walking tours through the caves, as well as boat tours through the glowworm grotto. These boat tours take visitors to the center of the grotto, where they can look up in awe at the luminescent glowworms covering the cave walls and ceiling.  

3. Mendenhall Ice Caves, Alaska

Just 12 miles outside downtown Juneau lies Mendenhall Glacier, known as the “Glacier Behind the Town.” Inside the glacier are the Mendenhall ice caves, passageways formed by water flowing through the glacier. These caves vary in size from tiny openings visitors have to squeeze through to giant caverns. Mendenhall Glacier was first explored in 1794 by Joseph Whidbey, a member of the British Royal Navy serving on Capt. George Vancouver’s 1791-95 expedition of the Pacific Northwest coast. To visit the caves, travelers can hike through the Tongass National Forest and then across the glacier, or they can canoe across Mendenhall Lake to the glacier. Both options offer breathtaking views of the glacier and surrounding landscapes, and both are somewhat strenuous but well worth the effort. Inside the caves, visitors are immersed in the cool blue shades of light coming through the glacier and can explore ever-changing ice formations. The caves change as the ice melts, so each visit to the Mendenhall ice caves is unique. The presence of the caves is also inconsistent and typically seasonal, so visitors should be sure to check on the status of the caves before planning a trip. 

4. Barton Creek Cave, Belize

To discover the wonders of Barton Creek Cave, visitors will have to board a canoe. Barton Creek Cave is located east of San Ignacio along the western edge of Belize. It is a wet cave because it has a cave river running through it, and paddling along this tranquil river is the only way to take in the cave’s majesty and history. It is the largest river cave in Belize and contains evidence of ancient Mayan culture. The cave is natural, but archaeologists have identified a number of areas they believe were purposefully modified by the Mayans to improve access to the cave. These modifications include natural formations of flowstone broken to allow access to a rimstone pool and holes drilled by Mayan tools, likely to serve as handholds or to attach climbing ropes. Ten ledges made by the Maya line the cave walls, where archaeologists have discovered thousands of pottery shards, most of which are from large jars called ollas, and a number of stone tools. These discoveries have helped archaeologists determine the use of the cave during Mayan times; it was likely the site of ritual activity and worship. The Maya regarded caves as sacred sites, and the artifacts found in Barton Creek Cave reflect this view. Tours through the cave offer visitors the opportunity to witness incredible natural formations and to learn how the ancient Mayans interacted with the cave. 

 5. Hang Son Doong, Vietnam 

For travelers who want to explore a cave but worry about darkness and small spaces, Son Doong Cave in central Vietnam is the perfect place to visit. Son Doong has the largest cross section of any cave in the world, reaching over 5 miles long, 650 feet wide and 490 feet tall. In some areas, the limestone ceiling of the cave grew weak and collapsed, creating huge skylights and allowing areas of lush vegetation to grow inside the cave. It was formed millions of years ago by the Rao Thuong River eroding limestone. Son Doong Cave was initially discovered in 1990 by a local man named Ho Khanh, who stumbled upon the entrance while searching the area for food and timber. He then returned home and no further exploration of the cave occurred until Howard and Deb Limbert, members of the British Cave Research Association, heard Ho Khanh’s story and urged him to find the cave again. In 2008, he successfully rediscovered the cave, and a survey was conducted by Howard Limbert and a group of British cavers. The cave opened to the public in 2013. Visitors are sure to be impressed by the sheer size of the cave, as well as its natural formations, river and distinctive vegetation growth. 

6. Puerto Princesa Underground River, Philippines

Located on Palawan, the westernmost island in the Philippines, Puerto Princesa Subterranean River National Park is home to old-growth forests, wildlife and an expansive limestone cave system. The Puerto Princesa Underground River, as it is commonly known, flows for over five miles through beautiful caverns and eventually meets the sea. Visitors can take underground river tours on paddleboats to see the stunning cave formations and limestone cliffs, as well as a variety of native animal species. There are records of the Puerto Princesa Underground River dating back to 1898, but it is believed to have been known to early inhabitants of the Philippines and investigated by foreign explorers prior to that time. The area was established as an official attraction in 1971, and the cave system is still being explored. In 2010, researchers discovered a large cave dome above the underground river, with more river channels and access to an even deeper cave. The Puerto Princesa Underground River offers an abundance of fascinating natural formations to explore. 

7. Shell Grotto, England 

Shell Grotto is one of England’s most mysterious sites, encompassing over 70 feet of tunnels under the seaside town of Margate. These caves were discovered by chance in 1835, when a man excavating his new land stumbled upon them. Sprawling mosaics made of mussel, oyster, whelk and cockle shells cover every wall of the tunnels. Historians are unsure of who built Shell Grotto, or why. Theories range from Shell Grotto being a place of worship to a simple display of extreme wealth to the meeting room of a secret society. The elaborate shell designs offer little explanation, displaying swirling patterns that can be interpreted as a number of different things. Shell Grotto is a tremendous work of art, and the questions surrounding its origin and purpose add a layer of intrigue that draws visitors from around the world. 

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Rachel is a student at Sarah Lawrence College in Bronxville, NY currently taking a semester off. She plans to study Writing and Child Development. Rachel loves to travel and is inspired by the places she’s been and everywhere she wants to go. She hopes to educate people on social justice issues and the history and culture of travel destinations through her writing.