Carl Tanzler was a doctor who was obsessively in love with one of his patients. Shockingly, his love took an unnatural turn after she died.

Queen Elizabeth I of England appeared to be in love with Robert Dudley. Then his wife died suspiciously. Was the Queen responsible?

The home of the Lancelin family in Le Mans, France, became the scene of a savage double-murder by the quiet housemaid duo, the Papin sisters.

Derinkuyu is an excavated underground city in Cappadocia, built thousands of years ago to serve as a refuge during waves of invasions.

History books say that Columbus first found the Americas. Although there are many theories, it is uncertain who really discovered America.

Camels originated in North America about 50 million years ago. How did the American Camelops spread across the world and what happened to it?

Responsible for millions of deaths, Queen Ranavalona I is unrivaled as a cruel and murderous ruler of Madagascar in the 1800s.

Although Maori legends and science attempt to explain the Moeraki Boulders of New Zealand, the giant round stones still maintain their mystery.