Archaeologists in Bulgaria unearthed a significant historical treasure hidden in the sewer system below an ancient city—but its discovery is not what’s making history.

Well, at least some of them are. While some of them sure aren't. And AirHelp has gone and ranked 239 of them across 69 countries—and these are the 35 best and the 35 worst.

History is full of unsolved mysteries, but sometimes, new technology leads historians to answers. Here are some historical mysteries that we’ve recently figured out.

The Hindenburg disaster was an infamous tragedy—but recently discovered documents reveal the untold, chilling truth about that fateful evening.

The resort brochure had promised crystal-clear water, a peaceful deck lined with loungers, and the kind of pool that becomes the center of every vacation memory. For the first few days, that promise held true. Then one morning, the water shifted to a murky green, with faint streaks of algae clinging to the sides. Staff continued to allow guests to swim, offering vague reassurances that chemicals would be added later. Situations like this can fall into a gray area between poor service and potential health code violations. Understanding where inconvenience ends and legal responsibility begins is the first step toward protecting both health and money.

Discover the top 10 extreme sports destinations in the U.S. Dive into the adrenaline-pumping world of adventure sports, understand their growing allure, and find out where to experience the ultimate thrills across the country.