Now, first up this year is Ukraine.
In 1986 it was still part of the USSR when an accident happened at Chernobyl -- a nuclear disaster of catastrophic proportions.
Diana Magnay has been to the exclusion zone, a nuclear wasteland frozen in time.
We're driving through the exclusion zone en route to Chernobyl.
It doesn't feel like a place where the world's worst-ever nuclear accident happened almost 25 years ago.
The sun lends a wintry charm to the derelict homes we pass.
Postcards from Soviet days scatter the floor. A doll, forgotten in the rush to leave.
In all, nearly 350,000 people were forced to abandon their homes as a radioactive cloud blew over Ukraine, Belarus and Russia.
This village is called Zalissya in Ukrainian, which literally means "behind the forest."
But as you can see now, it has been completely consumed by the forest.
And when the villages were evacuated about 10 days after the accident took place,
they thought that they'd be able to come back here, that this village would be inhabitable again.
But as you can see, that wasn't to be the case.
So, this is the memorial, because how many people died immediately after the accident?
Well, no, [the] first time, one person is buried inside of it.
Not buried, but his poor body wasn't found. Answer: about 30 people in one month died overall, highly radiated.
Yuri Tatarchuk, who's our certified guide from Ukraine's Ministry of Emergencies
says the final death toll from the nuclear fallout is impossible to calculate,but that it's less than people feared.
Estimates from the International Atomic Energy Agency put the number at 4,000,
but the World Health Organization points to 4,000 incidents of thyroid cancer among children from the affected areas.
So, now it's 8.7, 9 microsieverts.
Radiation's not down to normal, but Tatarchuk says it's not a health risk if you're just here for the day.
We're staying here just minutes, but it's not sure if such levels of radiation...inhabiting here is not allowed.
We're not the only visitors. A Russian tour group pick their way through frozen tower blocks in nearby Pripyat.
The town was evacuated the day after Reactor Number Four exploded, before the Soviet Union admitted it had a serious problem in one of its nuclear plants.
Jaroslav Bychkov wasn't born then, but he thinks it's important people visit so they understand the dangers of nuclear technology.
What exactly can you see when people don't care about something like the nuclear weapons and stuff.
I really think that we should get rid of that, you know? I don't want to see the places like this anymore in this world.
This year, the government will remove restrictions to the exclusion zone,turning these Soviet ghost towns into a tourist destination,
a chance for people to see for themselves the relics of a nuclear catastrophe frozen in time.