In a quiet corner of The Bronx, nestled among trees and quaint 1960s houses, the Cold War still lingers.

The center of intrigue is located in northern Riverdale, an area dominated by the towering, white apartment complex that houses diplomats and others who work for Russia’s Permanent Mission to the United Nations. Across the road, on West 255th Street, sits an unassuming two-story house that residents believe doubles as an FBI command post, they told The Post.

“When my windows are open, I feel like Big Brother is watching me,” said a 57-year-old resident who recently bought one of the homes facing the 20-story Russian tower at 355 West 255th St., which is surrounded by spiked fencing and features sports facilities and a school for the children of mission employees.

“It’s also a real eyesore and spoils our view,” he said of the pre-fabricated apartment building that was built by the Soviet Union in 1974.

Residents who lived in the area when Soviet construction workers built the apartment complex at the height of the Cold War remember it going up “from top to bottom,” with pre-fabricated slabs of concrete affixed to the skeletal structure.

“It was like they were assembling a piece of furniture from IKEA, only on a massive scale,” one longtime Riverdale resident told The Post.

Builders and all construction materials were imported from Russia so as to minimize the risk that American intelligence could plant listening devices or sabotage the construction, the resident told The Post.

Although it’s a mystery what goes on at the giant complex — a place many local residents refer to simply as “the compound” — most assume that many of their Russian neighbors are spies.

In fact, they were barely fazed by the arrest of alleged Russian spy Maria Butina in Washington, DC, last week. The same went for the Justice Department’s recent indictments against 12 Russian nationals as special counsel Robert Mueller continued his probe of Russian meddling in the 2016 presidential election.

Last March, the Trump administration expelled 60 Russians in retaliation for the poisoning of a former Russian spy in Britain. Twelve of those forced to leave the US lived in New York. In December 2016, President Obama expelled 35 alleged Russian spies in retaliation for what American espionage agencies said was Russian interference in the presidential election.

Many believe Riverdale has long been an epicenter of Russian intrigue and espionage. Soviet defector Arkady Shevchenko, a former advisor to the Soviet foreign ministry who lived in the building before he defected to the United States in 1978, noted in his book “Breaking with Moscow” that “the apartment building in Riverdale and the mission . . . bristled with antennas for listening to American conversations.”

Neighbors are not surprised, and some expressed anger, that the residents of the compound never bothered to reach out to them or invite them in for a tour.

“The only people who have ever been allowed in there were the police, fire department and the garbage collectors,” said Beth Zakar, a jewelry designer who lives across the street from the Russian Diplomatic Compound. “But there are spies everywhere here.”

In 2015, the FBI arrested Evgeny Buryakov, a Russian who lived blocks away from the Russian tower in Riverdale. He was accused of trying to recruit ordinary Americans to help him conduct economic espionage and communicated with “Moscow center” through codes from “a secure office” in Manhattan, court papers say. Buryakov, whose code name was “Zhenya,” was part of an elite trio of high-level agents who were based in New York. He was deported after pleading guilty to working as a secret Russian agent.

“No one knows what goes on there,” said Jane Reeder, a psychotherapist who has lived across the street from the Russian compound for 32 years. “They will walk past you on the street and there is never an acknowledgment that you are a person.”

In fact, the only time Reeder remembers the Russians making any impression on the community occurred when police were called to break up a group of rowdy Russian teenagers who were smoking and drinking outside her home in the wee hours of a summer morning.

“They were just being kids, but the police came and cleared them out,” she said. “Other than that, there’s been nothing.”

At the nearby European Gourmet & Catering, where smoked sturgeon and caviar are sold by the pound, an attendant said there were no tensions between local residents and the Russian nationals.

“Everything is fine here,” she told The Post in Russian-accented English.

The FBI did not answer a request for comment.

Additional reporting by Khristina Narizhnaya