Just around the corner from St Paul's can be found one of the City's older churches, and one that's unusually named after a French Saint.
On a side street, just about visible from the main road, lies one of London's greatest so-called hidden delights.
Earlier this week, the bells of St Pauls' were removed from the Cathedral, and sent back to their makers for repairs.
Access to the tower was via a very low corridor which cuts through the stone work of the tower, then it's all the way up on increasingly steep ladders.
If you're the sort of person to go to Biggleswade for a day -- such as to visit a 300 year old folly --maybe take in three very old, and very different types of church while you are there.
A nearly 150 year old church in South London is opening its tower for one day to let the public climb up and see the views from the top.
Slightly hidden away, Westminster Abbey has gained a striking new bronze tower that sits well against its ancient stones.
This pocket park covers the remains of St Mary Aldermanbury, a church that was destroyed during WW2, and rebuilt -- in the USA.
This small pocket park can be found slightly hidden away in a corner of a side street near the Guildhall and owes its current existence to the Great Fire of London.
A small side street near Cannon Street railway station marks the site of a ancient graveyard, and today, a ventilation shaft for the London Underground.
In leafy Clerkenwell is a mighty church that externally looks as polite as a Clerkenwell church should look, but inside is still showing the massive scars left by WW2.
Deep within the heart of King's College on the Strand can be found a most marvelous chapel and a dinky steam train.
There's a very significant church in docklands that allowed people to climb up to see the clock mechanism at the weekend. The scariest church tower climb I have ever done.
Windsor contains a church that despite walking past hundreds of times in my youth, I was never able to go inside -- until today.
Sitting not far from central London can be found the ruins of a large Abbey, which if it were almost anywhere else would be a major tourist attraction.