Wherio #12 — July 24th, 2026

Reactor 4 of the Chernobyl Nuclear Power Plant, near the city of Pripyat in Soviet Ukraine, exploded during a botched safety test simulating a station blackout. The explosion and fire spread radioactive contamination across Europe, forced the permanent evacuation of Pripyat, and required more than 500,000 personnel to contain, making it the worst nuclear disaster in history and, by some estimates, the most expensive disaster ever at some 700 billion dollars. Only Fukushima has since matched its maximum rating on the International Nuclear Event Scale.

Geography clue given: It is the largest country lying entirely within Europe.

Mao Zedong launched the Great Proletarian Cultural Revolution, calling on China’s youth to ‘bombard the headquarters’ and purge supposedly bourgeois elements from society. Young people formed Red Guard cadres, and the violence of Beijing’s Red August spread nationwide: schools closed, families were torn apart, temples and cultural treasures were smashed, and officials, teachers and intellectuals were persecuted, with a death toll in the hundreds of thousands at minimum. The decade of upheaval ended only with Mao’s death in 1976 and left scars China still grapples with.

Geography clue given: It shares a land border with fourteen countries, tied for the world's most.

As the Klondike Gold Rush erupted, tens of thousands of stampeders funneled through Alaska’s coastal ports toward the Yukon goldfields, most famously up the 33-mile Chilkoot Trail from Dyea through the Coast Mountains to the Canadian lakes beyond. Canadian authorities required each prospector to haul a year’s supplies over the pass, producing the era’s iconic images of human chains struggling up the ‘Golden Stairs’. The trail was rendered obsolete in 1899 by a railway over the parallel White Pass from neighboring Skagway, and it survives today as a historic hiking route.

Geography clue given: It is home to Yellowstone, widely considered the world's first national park.

The Olympic torch relay was invented for the Berlin Games, carrying a flame kindled by the sun at Olympia, Greece, across Europe to the host stadium. A symbolic flame had first appeared at the 1928 Amsterdam Olympics, but the relay itself was a new creation, staged by the Nazi regime for propaganda spectacle. Stripped of that origin, the ritual endured: every Olympics since has begun with the lighting ceremony among the ruins of ancient Olympia, linking the modern Games to their Greek roots before the cauldron is lit at the opening ceremony.

Geography clue given: It has thousands of islands scattered across the Aegean and Ionian seas.

At Bletchley Park, a country estate in Buckinghamshire, the Government Code and Cypher School broke the secret communications of the Axis powers throughout the Second World War, most famously the German Enigma and Lorenz ciphers. The team, three-quarters women and including Alan Turing, Gordon Welchman and Bill Tutte, built machinery to automate decryption, culminating in Colossus, the world’s first programmable digital electronic computer. Historians credit the intelligence, codenamed Ultra, with shortening the war; the work remained classified for some 30 years, leaving the codebreakers’ feats unsung for decades.

Geography clue given: This island nation once ruled the largest empire in history.