The Erawan Buddha Shrine was formally the Thao Maha Phrom Shrine and it is actually a Hindu Shrine - it houses a statue of Phra Phrom - the Thai representation of Lord Brahma.
The history of the Erawan Shrine is quite interesting as well
"The Erawan Shrine was built in 1956 to appease the supposed evil forces that were taking the lives of construction workers and causing other calamities in the construction what is now the Grand Hyatt Erawan. The misfortunes were caused, it seemed, by starting the construction on an unfavorable date.
After the shrine was erected, construction deaths stopped and the hotel grew very prosperous." - Sacred Destinations.
The attraction to here is enormous for tourists and it is always busy. There is the opportunity for you to have the trope dance for you - also very popular.'
Please remember that the pavements will be clear on a Monday.
The placing of the Shrine is relevant to the information above but only when you are there and the skytrain goes past, the motorbikes stream past you on the pavement and the cars make a lot of noise leaving the traffic lights that you realise that you really are in the heart of the Bangkok City.
There are always people selling birds to be released and I urge you not to buy the birds.