Here are a few examples of sites that can be visited on a Hidden London tour...there are of course many more.
The Globe Theatre rebuilt exactly as it was in Shakespeare's day in the 16th Century.
St Bride's Church
Sir Christopher Wren was our greatest ever architect whose masterpiece was St Paul's Cathedral built between 1675 and 1710. St Bride's is one of many other beautiful churches that he built in the Old City of London after the great fire of 1666. The steeple inspired the first tiered wedding cake.
The Art Gallery of Guildhall in the Old City of London. You can visit the remains of the Roman Amphitheatre of London that lie 20 feet below the gallery's ground floor.
The Gatehouse of the Church of St Bartholomew the Great.
The interior of the Church is the oldest in London and dates from 1123.
Guildhall.
A superb gothic hall dating from 1411 where ancient ceremonies of the City of London still take place today.