If you visit Way Arun in Bangkok, this historical mosque is worth a visit. From Wat Arun, you can search the route in Google Maps and follow it by walking for about 15 minutes. The location is a little bit hidden, in the corner at the end of the street under the fly over. The building looks old but magnificent. Too bad. I couldn't go in the last time I went there. Toilets are available at the back side of the area. Free drinking water can also be found. You can take a rest in a small open building with chairs and table. Just right in front of the mosque, you can find some halal food stalls. I guess they are open late in the afternoon or evening because when I got there at noon, these stalls are closed. Oh, I also met very friendly mosque guards in this Tonson mosque.