1. 1
   2
2. 3

Three Bronze statues called "Christ the Abyss" lie beneath the seas, waiting for divers to visit. The first was placed in the Italia Riviera in 1954, the second in Grenada in 1961 and the third in Key Largo in 1965.

1. Jamaica
   Aruba
2. Bermuda

Port Royal, Jamaica had a reputation as a pirate haven after it was founded by the Spanish in the 16th century. It was the largest city in the Caribbean when it sank during a 1692 earthquake, leaving 33 acres of buildings resting on the sea floor.

1. 1925
   1955
2. 1985

After sinking in 1912, the location of the Titanic was a major mystery until the wreckage was located in 1985. In 2012, the site gained protection from UNESCO, which may help keep out treasure hunters and curiosity seekers.

1. England
   Canada
2. Japan

The Titanic was discovered by explorer Robert Ballard. It sits around two miles below the sea, 400 miles east of Newfoundland in Canada.

1. Mariana Trench
   Eurasian Divide
2. Dragon Hole

Situated southwest of Guam, parts of the Mariana Trench extend 36,200 feet below the surface of the ocean. To put it in perspective, the average depth of all the oceans is around 12,100 feet.

1. Zeus
   Atlas
2. Tritan

An 18-foot tall, 60-ton concrete sculpture called "Ocean Atlas" was sunk into the sea near Nassau, Bahamas in 2014. It was modeled after a local girl and is meant to draw attention to the plight of the world's oceans.

1. Pharos of Alexandria
   Colossus of Rhodes
2. Temple of Artemis

Constructed around 280 BC, the Pharos -- or lighthouse -- of Alexandria guided ships into the bustling Harbor of Alexandria. Once thought gone for good, the lighthouse, and many other ruins of the ancient city, were rediscovered beneath the sea in the 1960s.

1. Mariana
   Silfra
2. Apollo

The Silfra fissure separates the North American and Eurasian continental plates. Located near Iceland, it's one of the world's top dive sites.

1. guarding serpent
   deep water
2. a million fish

The creators of the world's largest artificial reef in Quintana Roo, Mexico chose the name Kan-Kanan, which means guarding serpent, for their structure. Made from more than a thousand concrete pyramids sunk below the waves, the reef stretches 1.2 miles along the Mexican coast.

1. Iceland
   Japan
2. Florida

In 2006, the U.S. Navy purposely sank the U.S.S. Oriskany off of Pensacola, Florida, creating what was then the largest artificial reef on the planet. The 44,000 ton warship now protects the coast from erosion and serves as a home for many aquatic species.

1. Australia
   Canada
2. China

Australia's Great Barrier Reef is the largest reef system on the planet. Consisting of around 3,000 separate reefs covering 1,400 miles, the Great Barrier Reef is a popular spot for underwater researchers, scientists and divers.

1. Red Sea
   South China Sea
2. Bay of Fundy

Blue holes are large underwater caves that appear as large blue circles on the surface of the sea. The deepest blue hole in the world stretches down 1,000 feet in the South China Sea.

1. Greece
   Mexico
2. China

Established around 5,000 years ago, Pavlopetri, Greece sank beneath the sea over time thanks to a series of earthquakes around 1,000 BC. Rediscovered in 1967, the site consists of at least 15 separate buildings ripe for exploration and study.

1. true
2. false

Discovered in 2013, Tamu Massif in the Pacific Ocean is the largest volcano in the entire solar system. At more than 4 miles tall, the top of the crater sits 1 mile below the surface of the water.

1. Egypt
   France
2. Japan

The S.S. Thistlegorm sank off the coast of Egypt in 1941. The massive ship still sits on the bottom of the sea, its cargo of motorcycles, vehicles and other World War II equipment left to rust away.

1. Cancun
   Acapulco
2. Cabo

Between 2009 and 2013, more than 500 sculptures were sunk beneath the sea to create the Cancun Underwater Museum. Many of the sculptures were created using casts of local people, giving them tremendous expression and detail.

1. 5 percent
   30 percent
2. 60 percent

Thonis-Heracleaion and nearby Canopus were major Egyptian port cities around the 7th century BC. Thanks to a series of earthquakes, both cities, and their impressive buildings and artwork, sunk beneath the waves. After a 2016 excavation, just 5 percent of these sites have been excavated, leaving countless treasures under the sea ready to explore.

1. true
2. false

Exploration group Ocean X found an anomaly in the Baltic Sea in 2011, leaving many to suggest that the structure was a UFO. Experts have determined that the image likely shows a natural rock outcropping or underwater gas vent. Not convinced? Keep in mind that the widely-circulating pictures of the structure that resemble the Millennium Falcon are artist renderings, not actual photos.

1. Italy
   France
2. Greece

Imagine if Las Vegas ended up underwater -- that's Baiae, which was an Italian resort town on par with Las Vegas back around 178 BC. The cities sculptures and massive temples rest beneath the Gulf of Naples, just waiting to be explored.

1. gold
   guns
2. cars

The Zenobia was a Cyprus ferry that sank on its maiden voyage in 1980, taking 120 cars to the bottom of the sea.

1. $1 million
   $100 million
2. $1 billion

The treasure aboard the Spanish galleon San Jose, which sank in 1708, is valued at around $1 billion. As of 2016, the Colombian government and a U.S. salvage company continue to fight for the rights to the treasure.

1. government office building
   hydroelectric plant
2. highway

The 600-year-old city of Shi Cheng was sunk in 1959 to make way for a hydroelectric plant. The beautiful carvings and elaborate structures of the city now sit largely intact below Qiandoo Lake.

1. India and Sri Lanka
   Japan and Vietnam
2. Canada and Russia

Adam's Bridge, also known as Rama's Bridge, consists of limestone shoals connecting India and Sri Lanka. The shoals once served as a bridge between the two countries covering 30 miles, but cyclones and other events have sent much of the structure underwater.

1. computer
   death mask
2. telephone

The Antikythera sank around 65 BC near Greece. When it was discovered in 1900, explorers brought up a device now considered one of history's first computers -- the Antikythera Mechanism. The strange device was brought to the surface, but the wreck still sits on the ocean floor.

1. China
   Japan
2. Russia

Experts still don't know for sure if the Yonaguni Monument off the coast of Japan is man-made or natural. The massive structure measures 27 feet tall and features incredibly straight lines and precise angles that appear as though they were crafted by hand.

1. pyramids
   mummies
2. megaliths

Atlit-Yam off the coast of Israel was discovered in 1984 and dates back to 6900 BC. The now-sunken city features a series of stone megaliths arranged in a circle -- like Stonehenge -- along with homes and other structures.

1. 1946
   1966
2. 1986

Once a busy research station, the Jules Undersea Lodge in Florida became the first underwater hotel in the U.S. when it opened in 1986.

1. cyclone
   cannons
2. rocks

The SS Yongala sank in a cyclone in 1911 -- one year before the Titanic. It was rediscovered in 1958 and remains one of the largest and most intact shipwrecks in the world.

1. Maldives
   Ibiza
2. Miami

Subsix in the Maldives became the world's first underwater nightclub when it opened in 2010. It was built on land first, then sunk 20 feet below the surface of the Indian Ocean.

1. 1 percent
   10 percent
2. 50 percent

An estimated 3 million shipwrecks remain beneath the seas, and only around 1 percent of these have been explored, leaving plenty of new terrain for underwater explorers.