Two hours south by bus or taxi — beach, water park, international restaurants and a nightlife scene.
A coastal resort 140 km south that grew from a US military R&R destination in the 1960s into a major tourist city — famous (or notorious) for its nightlife.
Pattaya Beach itself is crowded and not particularly clean; Jomtien Beach (3km south) is quieter; Koh Larn island (30-minute speedboat) has better water.
Buses from Eastern Bus Terminal (Ekkamai BTS) every 30 minutes, 2 hours, 120 THB; taxis 1,500–2,000 THB one-way; no direct train.
Focus on Koh Larn island (take speedboat from Bali Hai pier), Sanctuary of Truth temple (extraordinary 500-seat teak structure), or Mimosa shopping complex.
Better for travellers wanting a quick beach fix or specific attraction (Sanctuary of Truth, Koh Larn) than for those seeking Thailand's best beaches — several southern islands offer clearer water within a similar travel radius.
A day trip is tight given the 2-hour transit each way; an overnight stay makes the trip feel far less rushed, especially if visiting Koh Larn.