5 secret London Landmarks you didn't know about and why they're worth a visit

London is home to many historical and modern landmarks that attract millions of tourists every year.

From the grand royal Buckingham Palace with the changing of the guards to the bell of Big Ben and the flourishing indoor plants up in the clouds at the Sky Garden, you can never be bored in London.

But with so many options of landmarks and historical locations to visit, it can be easy to forget about those that might not get as much attention as they deserve.

Away from the tourist must-sees and hotspots, London has endless attractions to see, each remarkable in their own way.

Whether you're a born and bred Londoner or are visiting the great region, discover the top five secret London landmarks you need to visit.

5 secret London landmarks you need to visit

Crossness Pumping Station

In the south east borough of Abbey Wood lies the Crossness Pumping Station a former sewage pumping station.

Don't be thrown off by its former job, designed by the Metropolitan Board of Works's chief engineer Sir Joseph Bazalgette and architect Charles Henry Driver, the pumping station has a stunning design.

With bright bold colours and patterns, the station hosts open days and guided tours throughout the year with tickets ranging from £4 to £18 per person.

You can find out more about the Crossness Pumping Station via the website here.

Severndroog Castle

Set a little bit further out than most London attractions in Shooter's Hill, the Severdroog Castle is not to be missed offering one-of-a-kind views of the region.

Dating back to the 18th century, the castle is a preserved Gothic tower on one the highest points in London.

With a viewing platform and gallery open every Sunday, the Grade II listed tower gives you 360-degree views of the capital.

You can find out more about the Severndroog Castle via the website here.

Wimbledon Windmill Museum

It's not often you see a windmill in London, but in Wimbledon, you can explore the historic Wimbledon Windmill Museum.

Opening back in the 18th century, the windmill was created by carpenter Charles March and was in work until 1846 when the miller was evicted by Lord of the Manor, Earl Spencer.

In 1976 the windmill became a museum, allowing to shine a light on the windmill itself, the local history and the Scouting movement.

It's free to enter but donations are welcomed and you can find out more via the website.

Crossbones Graveyard & Garden of Remembrance

The historical site of Crossbones Graveyard should not be forgotten, let in the back streets of London near Shakespeare Globe and Southwark Cathedral and The Shard.

The area is believed once to have been a pauper graveyard known as The Mint and according to local lore was at one point the final resting place for the Winchester Geese, medieval sex workers.

When it closed in 1853, Crossbones had the remains of an estimated 15,000 paupers and in the late 1990s saw a shrine place with a red iron gate at Redcross Way.

You can find out more about Crossbones via the website.

The smallest police station in the UK

Directly in the heart of London, despite Trafalgar Square being a landmark in its own right, the square actually holds a secret landmark.

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Hidden away in the south east corner of Trafalgar Square lies the UK's smallest police station.

The tiny box is said to have space to accommodate up to two prisoners at a time but its main use was to hold a single police officer.

While you can not enter the box as it's now used for a broom cupboard by Westminster Council, you can still get up close to the location.