
Underground mysteries
Caves are natural holes underneath the surface of the earth that are hollowed out rock typically formed by water. If you’ve ever been able to visit one in person, you know how amazing it feels to stand inside of one. If you haven’t had the chance to visit one in person, or just want to experience more caves around the world, get taken away with these breathtaking photos of these natural creations.

Melissani Cave
Melissani Cave is located on the Greek island of Kefalonia. It has two chambers within the cave, one chamber is open at the top and sunlit, while the other is dark and covered in moss, stalagmites, and algae.

Benagil Cave
Benagil Cave sits on the southern coast of Algarve, Portugal. The currents around the cave can be strong so instead of swimming, many people will travel to visit the cave using a stand-up paddleboard or by boat.

Saeva Dupka Cave
This cave is in northern Bulgaria. It was named after two brothers, Seyu and Sae, who are rumored to have hidden in the cave during the Ottoman occupation of Bulgaria. The cave is known for having excellent acoustic conditions and occasionally concerts are held there.

Reed Flute Cave
Reed Flute Cave was named after the green reeds that grow outside of it that people use to make flutes. This spectacular cave is located in Guilin, China. Colored lights illuminate the stalactites, stone pillars, and rock formations within the cave for tourists to look at.

Jenolan Caves
The Jenolan Caves in the Blue Mountains of New South Wales, Australia is one of the most breathtaking sites you can visit in the area. It’s one of the oldest cave systems in the world and is filled with underground rivers and limestone crystal formations.

Langjokull Glacier ice cave
This huge cave, that looks almost like a wave, was formed from either a hot spring underneath the glacier or meltwater from the surface. This ice climber is 80 feet deep in the glacier cave. Speaking of waves, check out these breathtaking wave photos you won’t believe are real.

Grotta Azzurra
The Grotta Azzurra or Blue Grotto is located on the island of Capri in Italy. Even though the blue of the water in this photo looks fake, it hasn’t been retouched. The water inside the cave is a crystalline blue with silver reflections.

The Arta Caves
Seen here is the entrance to one of the chambers in the Arta Caves in Mallorca. Huge stalactites hand down from the ceiling creating gorgeous cathedral-like structures. Guided tours with special effects of given of the different chambers.

Phraya Nakhon Cave
The Phraya Nakhon Cave is located inside Khao Sam Roi Yot National Park in the Prachuap Khiri Khan Province of Thailand. In the morning, sunlight fills the cave illuminating the small pavilion that sits at the bottom of it. The Khuha Kharuehat Pavilion was built in 1890 for the visit of King Chulalongkorn.

Diros Caves
The Diros Caves in Greece were discovered in 1958. The cave is covered in stalagmites and stalactites, some measuring over 1,600 feet tall. These are the best-hidden gems to explore in every state.

Devetashka Cave
This enormous cave in Bulgaria was once inhabited by thousands of humans. Now that humans no longer live in it, around 30,000 bats have made it their home. One of the unique features about the Devetashka Cave is that seven holes in the top of it allowing sunlight to come through and illuminate the space below.

Stopića Cave
The Stopića Cave is located on the left bank of the Prištavica river in Serbia. The main attraction of the cave is the underground waterfall that measures almost 33 feet high. These pictures of abandoned churches around the world will give you goosebumps.

Woolshed Cave
This large cavern was carved into a granite cliff by wave erosion. Located in southern Australia, people can visit this cave on Talia Beach as well as nearby blowhole and a large crater.

Algar do Carvão Cave
This cave is an ancient volcano vent located in the middle of the island Terceira in Portugal. This image shows the entrance to the cave, it looks as though you are entering a heavily forested jungle when you enter the cave. Take a look at these gorgeous river photos from around the world.

Temimina Cave
Temimina Cave is a small cave located inside of the Alto Ribeira Touristic State Park in São Paulo, Brazil. The park is known for its many caves.

Postojna Cave
While this photo isn’t of the inside of a cave, you can see the cave behind this old castle. Predjama Castle in Slovenia was built into the side of a mountain and is the world’s largest cave castle. Under the castle is a massive cave with four floors as well as a network of secret tunnels.

Cango Caves
The Cango Caves are the largest cave system in Africa. Located in Oudtshoorn, South Africa the caves were discovered in 1780 by a local farmer. These are the most colorful natural wonders on earth.

La Cueva Horadada
This cave in Spain has a large entrance facing East. This image shows the hole in the roof of the cave. The rock walls on the inside of the cave have formed hexagonal shapes from wind erosion.

Waitomo Caves
Waitomo Caves in New Zealand are also known as the famous glowworm caves. Thousands of glowworms line the walls of the cave creating an unforgettable luminescent light for those that travel through.

Crystal Caves
Besides the beaches, The Crystal Caves are one of Bermuda’s most beautiful natural attractions. The cave was formed during the ice age has an ocean-fed lake at its base with clear blue water. Discover these 20 beautiful sea caves around the world.

Batu Caves
The Batu Caves in Malaysia consist of three large caves, and a number of smaller ones, in a limestone hill. The 100-year-old temple inside the cave serves as an important religious landmark by Hindus.

Fingal’s Cave
Fingal’s Cave in Scotland is 72 feet tall and 270 feet deep. The most unique feature of the cave is the hexagonal columns of basalt that make up its walls. The columns form a walkway, allowing visitors to walk in and explore the cave. Check out the most stunning deep-sea sights ever discovered.

Son Doong Cave
Located inside the Phong Nha-Ke Bang National Park in Vietnam, the Son Doong Cave is the world’s largest cave. The name translates to “mountain river cave.” It was created two to five million years ago by river water eroding away the limestone underneath the mountain.

Cueva de los Verdes
This cave, located on the island of Lanzarote in the Canary Islands, was formed after the eruption of a volcano. During the 16th and 17th centuries, it was used as a hideout for locals to protect themselves from pirate attacks.

Mammoth Cave
Mammoth Cave National Park in Kentucky is the longest known cave system on earth with over 400 miles of caves. The park has a dozen miles of cave trail below ground and 53,000 acres of forest to explore. Now, see some more spectacular photos of America’s national parks.