Half Dome, Yosemite National Park, USA

The 1500-metre climb to the top of Half Dome is the most strenuous of Yosemite Valley’s day hikes, and it’s the last 120 metres that are the most dangerous. It’s a near-vertical climb, and while there are ladder-like metal cables to help you reach the summit without rock climbing equipment, falling off them could be deadly. And let’s not forget that Half Dome is basically a huge lightning rod, and in 1985, lightning struck five friends on the park’s tallest granite peak, killing two and injuring three.
Cliffs of Moher, Ireland

With breathtaking views of the Aran Islands and Galway Bay, the Cliffs of Moher is one of Ireland’s most popular tourist attractions. However, it’s also one of the most dangerous, and one misstep at the edge could result in a 213-metre tumble into the Atlantic. The safest way to experience the awe-inspiring beauty of the cliffs is from the official path or one of three viewing platforms.
Running of the Bulls, Pamplona, Spain

Thousands of thrill-seekers make the journey to Pamplona each year to run with the bulls. Amazingly, only 16 people have been fatally gored at the Spanish festival since 1910, according to the Running of the Bulls’ site. Injuries by goring or being trampled by other runners are more likely but, luckily, still slim. To put that into perspective, FiveThirtyEight reports that you have the same chance of having an unproduced screenplay turned into a feature film as getting injured while running with the bulls.