Chao Phraya Express Boat
A ride on the Chao Phraya River should be high on any tourist's agenda. The cheapest and most popular option is the Chao Phraya Express Boat , basically an aquatic bus plying up and down the river. The basic service plies from Wat Rajsingkorn (S4) all the way north to Nonthaburi (N30), with stops at most of Rattanakosin's major attractions including the Grand Palace (at Tha Chang) and Wat Pho (at Tha Tien). The closest pier to Khao San Road is Phra Arthit. Enter the express boat at the numerous piers and pay for the trip at ticket collector, who will approach you bearing a long metal cylinder. At some bigger piers you can buy the ticket before boarding. When the metal cylinder lady approaches you, just show her the ticket you bought on the pier.