Sri Maha Mariamman Temple is also known as Maha Uma Devi Temple in Silom. This was a wonderful place tucked into the corner.
It is a Hindu Temple which was (I read) built by Hindu's who no longer wanted to live in India under colonial government so they left.
There are many reasons but this is a place that you really must visit.
However you must be aware that visiting here for the opportunity to take photographs is not permitted
Despite this the Hindu temple is worth visiting for the wonder the I felt when I walked in.
Remembering to buy my offering outside first of course though.
Here is a site with some photographs inside.