he

because the island was used as an anthrax testing ground and there is anthrax in the soil on the island

because it stinks

During the second World War, in 1942, Britain experimented with the Anthrax bacterium on the Scottish island of Gruinard. The experiments were undertaken because Britain feared that they would be attacked by Germany with similar biological and chemical weapons. Thankfully, Anthrax was never used as a weapon in World War II. The island remained "out of bounds" for several decades. In 1986 a company was employed by the British government to decontaminate the island. The island was finally declared "safe" on 24th April 1990.

Beehive Island, Bighorn Island Black Island, Black Ridge Island, Channel Island, Crescent Island, Deadmans Island, Decision Island, Fish Island, Gunsight Island, Heron Island, Houseboat Island, Hualapai Island, Little Boulder Island, Middle Boulder Island, Middle Islands, Plane Crash Island, Pool Island, Pyramid Island, Ramshead Island, Rock Island, Saddle Island, and Sand Island are the major named islands in Lake Mead, Nevada.

Candy island

Family island

Shopping Mall island

Fruit island

Rainbow island

Sports island

Mystery island

Holiday island

Season island (Winter, spring, fall, summer)

Nature island/Flower island

Technology island

Fred Meyer island

Underwater island

Etc...