Is this a ghost floating over the Tower of London?

A man believes he may have spotted a ghost in eerie footage shot at the Tower of London.

Paranormal investigator, Mark Vernon, 52, visited the historic building in June, when he recorded a video showing an unusual grey shape moving around in the sky near the tower.

"I could feel the presence," Vernon said. "It's like a little electrical shock when a presence comes close to me."

Vernon believes the "figure" he captured was the entity of a lost soul from the tower.

“That's why I started filming," he said.

RELATED: The spookiest ghosts in American history: 

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The spookiest ghosts in American history
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The spookiest ghosts in American history

Abraham Lincoln

Perhaps the most famous American ghost of all, legend has it the former U.S. president never left the White House following his assassination. His spirit supposedly remains to complete the business of his abbreviated second term and to be available in times of crisis.

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Dolley Madison 

Dolley proved she's not one to mess with even after her death. Woodrow Wilson's wife Edith ordered White House gardeners to dig up Dolley's garden, but it never happened after her ghost supposedly scared the staff away.

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Andrew Jackson

The ghost of former president Andrew Jackson is believed to still be in his old bedroom -- the Rose Room -- at the White House. Twenty years after Jackson’s death, Mary Todd Lincoln, a devout believer in the spirit world, told friends that she’d heard him stomping through the corridors of the White House.

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Abigail Adams

Former U.S. president John Adams and his wife Abigail were the first inhabitants of the White House. It turns out Abigail never left! Supposedly the ghost of Abigail has been seen hurrying toward the East Room where she used to hang her laundry. 

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The USS Constellation 

The first sightings of ghosts started as soon as the USS Constellation was decommissioned and permanently docked in Baltimore in 1955.

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Theodosia Burr

The wife of wealthy Governor Joseph Alston of South Carolina, left her husband’s plantation and sailed north on the Patriot to visit her father in New York City. After her ship was raided, Burr was never seen again. Legend says that she survived and was taken care of by a Banker fisherman and his wife. 

Years later, Burr was on her deathbed. A doctor was called but Burr didn't have any money to pay the doctor -- he wanted the painting of Burr hanging on the wall as payment instead. She refused and ran out the door with the painting. The painting was found washed up on the shore and Burr was never seen again.

(Wikimedia Commons)

Sarah Soule

There’s plenty of ghost ships in sea mythology.

One is the Sarah, named after a woman two sailors had fought over.

The one who won her heart named his ship Sarah, but ill-fortune had it lost at sea of Potts’ Point in Sydney. 

Some believers say they have spotted the ghost of the ship off the coast.

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As Vernon was following the ghostly figure with his camera, however, he said his battery ran out.

Vernon said he often has what he calls paranormal experiences, including separate instances at the Tower of London.

"I have filmed inside there and caught other stuff on camera as well as recording electronic voice phenomena," Vernon added.

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