Ko Lan

Lying about 7.5 kilometers off of Pattaya by a 45-minute ferry or 15 minutes by speed boat ride, the island measures 2 kilometers by 5 kilometers and offers several white sandy beaches, notably Hat Ta Waen, Hat Laem Thian and Hat Thong Long, the latter facing coral reefs. Visitors can choose either snorkeling or viewing the coral from glass bottom boats. Ferries to the island leave South Pattaya pier daily from 10.00 a.m. to 6.30 p.m. Cruises by sailing junks, with lunch provided are also available.


http://www.tourismthailand.org/attraction/chonburi-20-3287-1.html

Hat Pattaya

Hat Pattaya | Hat Chomthian
image credit: http://www.thailandlimoairport.com

The half-moon-shaped Pattaya Beach is 4 kilometers long with a road running parallel to the beach. From the mid-section to the southern end of the area, there is a vast array of restaurants, bars, department stores, souvenir stores, as well as other places of entertainment. To the north of the beach are various mini-resorts and hotels in a quieter atmosphere.

It's actually free to stroll along the beaches, but operators will charge you for the services they provide, i.e. the beach chair. A price is roughly $0.5 per chair, though bargaining is rather customary in Thailand.

Hat Chomthian

The former paddy fields have turned into a thriving beach. Only 3 km. down Pattaya Beach, Chomthian is highly recommended to those who seek a quieter resort. The 6-kilometer long, largely straight beach is popular with windsurfers and watersports enthusiasts. It is also quieter and more relaxing than Pattaya Beach. Hotels and other accommodation facilities are available along the road that runs parallel to the shore.