The Cold War never got hot — nor did this nuclear power plant.

Darmon Richter, a British “recreational trespasser,” sneaked into what’s left of a Cuban nuclear power plant and snapped photos of the Cold War relic.

When Cuban and Soviet authorities agreed in 1976 to build the Juragua Power Station, it was believed 15 percent of the island’s electricity would be generated at the plant in the province of Cienfuegos, Barcroft Media reports.

Construction on reactors began in 1983, but they were never completed as Cuba’s bankroll, the Soviet Union, collapsed.

Fidel Castro suspended construction in 1992 and the project was formally shelved in 2001 when Russia and Cuba couldn’t work up the financing.

Now the half-built plant, about 180 miles south of Key West, sits as a ghostly reminder of Cold War tensions.

The site is still protected by guards, but Richter, 32, said he still managed to get inside. He found that the Juragua Power Station is now home to bats, crabs and mosquitos.

Rust and graffiti covered walls and abandoned equipment.

“It was a difficult site to explore, largely given the security presence around the reactor,” Richter said after sneaking inside earlier this year.

“Finding a discreet approach and then sneaking past the guards gave the experience a real problem-solving feel to it — in many ways, it felt almost like a computer game.”

The abandoned site still has one great function — as plateau to spectacular Caribbean sunsets.

“Though none of the staircases and chambers inside the reactor building were particularly unusual when taken alone, still the sense of having made it inside gave the place real significance for me,” Richter said.

“Perhaps the best moment of all was reaching the top level, just in time to watch the sun set over the Caribbean.”