The great treasures of the sea lie far beneath the surface. Majestic coves offer spectacular rock formations, beautiful corals, and first-hand views of fish ranging in size from small to large. The luminescent waters and unique experience are a no-brainer worth the adventure. Here's a list of the world's top underwater caverns to explore for daring underwater hunters out there:

10 The Grotto, Bruce Peninsula National Park

The Grotto in Cyprus Lake, Tobermory is a natural gem of Bruce Peninsula in Canada. Thousands of visitors would come every year to witness the beauty of this wonder. It features the crystal clear blue waters of Bruce Peninsula and fascinating cave structures. The best way to come here is to hike from the National Park. It is advised to book for parking space which costs $8.50 to $11.70 per vehicle. Time slots for the parking space are 8:00 a.m to 12:30 p.m, 12:00 p.m to 4:00 p.m, and 4:00 p.m to 8:00 p.m.

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9 Dos Ojos

Located in the northern part of Tulum, Mexico, is the Cenote Dos Ojos, a popular sinkhole worldwide. The limestone cave has appeared in movies and numerous documentaries; it was first explored in 1987. It has been recorded for having the deepest underwater passageway; it is about 396 feet below with 24 to 25 degrees Celsius. The entrance fee is $14 to $18 and is open from 8:00 am to 5:00 pm.

8 The Great Blue Hole

When it comes to intriguing sinkholes worldwide, the Great Blue Hole is one of the seven wonders. Great Blue Hole is a giant sinkhole located off the coast of Belize that forms part of a reef system and is a popular diving destination for divers who are drawn by turquoise waters and the possibility of seeing both fish and sharks. This fantastic cave is roughly 125 meters deep and is dubbed the world's largest undersea cave. The cost of snorkeling and diving ranges from $40 to $350, but there are various ways to see this treasure, including scuba diving, boating, and helicopter.

7 Ginnie Springs

Ginnie Springs offers three different diving sites for licensed scuba divers: The Devil's Spring System, The Ginnie Ballroom, and the Santa Fe River. The diving center offers extensive diving equipment and training from professional instructors at Ginnie Springs. Wetsuits can be rented for $5 to $15; a scuba package is available on rent for $60. The entrance fee in Ginnie Springs for adults is $14, while $3 for children and free admission for kids below five years old.

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6 Cenote Chac Mool

Located in Playa del Carmen, Mexico, it is 36 feet deep Cenote Chac Mool which consists of three different entrance dives. What's unique about this cavern is its halocline, wherein the freshwater meets the salt and creates visual effects together. It is also an ideal diving spot, especially for beginners' divers. For $120, divers can explore the cave. The package includes transportation, lunch, a complete cave guide, full equipment, and two dives in Cenote Kukulcan and Cenote Little Brother.

5 Homestead Crater

Located in Homestead Resort in Midway, Utah, is the 10,000-year-old geothermal spring - Homestead Crater. It is inside a limestone dome with a hole where natural sunlight and air come in. It is a popular attraction to tourists, especially during winter, for it maintains a temperature of 90 to 96 degrees throughout the year. The admission fee to the crater for scuba divers is $22 to $27. Equipment rental costs $25 without the tank that costs $7.

4 Chinhoyi Caves

Tucked in the beautiful forest of Makonde District, Mashonaland West Prince is Zimbabwe's natural gem – the Chinhoyi Caves. This limestone cave, which has been sculptured over generations, is filled with mystery. The den features clear blue waters, 80 to 90 meters deep. It is open from Monday to Sunday from 9:00 am to 6:00 pm. It is $59 per person for scuba diving and an admission fee of $3 to $10 per person.

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3 First Cathedral

Located in the southeast of Hulopoe Bay, Lanai, Hawaii, is the beautiful First Cathedral cave, about 25 to 60 feet in depth. The den features two vast towers of a lava tube, rides, tunnels, and passageways. A hole can be seen at the top, creating a dramatic spotlight effect inside. All level divers can explore the cavern and get a chance to see sharks, turtles, lobsters, a variety of fish, and mesmerizing colorful corals. Diving costs $225 for certified divers, lunch included, and is available from Monday to Saturday.

2 Orda Cave

The Orda or Ordinskaya Cave is Russia’s longest cave and the world’s largest underwater limestone cave, spanning over 16,000 feet long and featuring massive galleries compared to cathedrals, clear waters, and crystalline canopies. It is located in Perm Krai, Russia, 617500 and is only suitable for certified divers as the water has a low temperature of 39 to 44 degrees Fahrenheit. Diving in the cave costs $336 per person and the best time to dive is during June through August.

1 Chandelier Cave

This five-chamber cavern is one of the world’s most distinctive diving destinations, known for its spectacular hanging rock formations serving as chandeliers to the cave. Aside from these magnificent stalactites that touch the clear waters, divers can also explore the aquatic life of the cave. This wonder can be found in Malakal Harbor, Palau, and costs $160 to dive. The ideal time to visit is November and May during the dry season. All diver levels can access the cave; the average depth is 4 meters with a maximum of 15 meters.

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