Diving area

Diving areas are a new type of lot assignment that came in The Sims 3: Island Paradise. Unlike other types of lot, diving areas take place completely underwater. Sims can only visit them by scuba diving.

There are four default diving areas in Isla Paradiso. Each of them can only be accessed by having sufficient level of Scuba Diving skill. Below is the list of the diving areas in Isla Paradiso:

• Rocky Reef (Scuba Diving level 2)
• Davy Jones' Locker (Scuba Diving level 4)
• Mermaid Grotto (Scuba Diving level 7)
• Pearl's Deep (Scuba Diving level 9)

Trivia

• It's possible for advanced players to edit other premade worlds and make their own diving areas. Diving areas are not exclusive to Isla Paradiso. However, there are several worlds which cannot have diving areas, due to the sea being too shallow or not properly set as "ocean". Appaloosa Plains, Lunar Lakes, Riverview and Twinbrook are the worlds that cannot have diving areas due to the restrictions.
• While the SimGurus have said that making dive lots is not possible, it is possible to make them without the use of mods. This tutorial shows how to make a dive lot.
• tested for dive spots and have worked: 

Base Game and Expansion Pack Worlds

Sunset Valley – Yes

Twinbrook – No

Bridgeport – Yes

Appaloosa Plains – Yes

Starlight Shores – Yes

Moonlight Falls – Yes

Isla Paradiso – Yes

Sims University – Yes

Al Simhara – Yes

Shang Simla – No

Champs Les Sims – Yes

Store Worlds

Riverview – Yes

Barnacle Bay – Yes

Hidden Springs – Yes

Lunar Lakes – No

Lucky Palms – Yes

Sunlit Tides – Yes

Monte Vista – Yes

Aurora Skies – Yes

Dragon Valley – Yes

Midnight Hollow – Yes