Bangkok's Sukhumvit area is the prime hub for mid-range and upscale hotels, while Khao San Road and Silom cater to backpackers. Riverside luxury hotels (Mandarin Oriental, Capella) are among Asia's finest.
On the islands, Hat Yai Bay and Patong Beach in Phuket, Chaweng in Koh Samui, and Ao Nang in Krabi each have dense accommodation strips ranging from $10 guesthouses to $500/night villas. Book ahead for peak season (November–February).