Going back, you have the option of riding a motorcycle which would bring you to the mini-bus terminal, or you could walk for about 30 minutes. Mini-bus to Bangkok would be 90 Baht again. Alternately, just across the mini-bus/van terminal is the bus terminal which would bring you to the Bangkok's Main Bus Terminal for only 63 Baht. You would have to take another bus (see picture) to go to the city center, which would cost you another 19 Baht. The difference is 8 baht and it's not worth it. Take the mini-bus/van and it's quicker, just one ride straight to Victory Monument.