The deadliest diving spot in the world is also a stunning geological marvel.

Ruins of the Crusaders' headquarters.

Mysterious lost empire of the Silk Road.

The original goat tower, the one that started it all.

Haven for Cape Fur Seals, until the Ring of Death of jumping Great White Sharks arrives.

Mined to a depth of 240 meters with a perimeter of about 1.6 km, the largest hand-dug excavation in the world.

One of the tallest buildings in Africa provides a great view of Johannesburg's unique geography.

The loneliest plant in the world resides at the Durban Botanic Gardens...mostly.

Largest cave system in Africa.

Sculpture park built by a 50-year-old widow.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

The most loyal of little dogs, or a Victorian era publicity stunt?

Both church and state get put to the torch in this annual festival in the "Bonfire Capital of the World."

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."