The doctor, the treehouse and the wardrobe

From a distance, Dr Yaz Romahi's treehouse is already visually impressive - and as you step over the threshold, it's able to transport you into a mythical world.

Cedar Hollow is inspired by C.S Lewis' Chronicles of Narnia and even features the eponymous wardrobe from the first book in the series.

But this wardrobe transports the user into the Oxfordshire countryside instead of Lewis' fantasy land of magic, mythical beasts and talking animals.

Dr Romahi has a PhD in AI and is a member of the magic circle. "Everyone just talks about the fact they're transported back to their childhood," he says.

The light switch is a nod to Lewis' old drinking buddy JRR Tolkien

"Sometimes I say I'm still a child and I still like to live my childhood through my engineering - it's a labour of love really."

"We've always been fans of Narnia - in fact actually when we first moved here I remember my cousin coming, and as we were driving up the driveway she said 'oh wow - this is like Narnia' and I laughed because she didn't realise CS Lewis' old house is literally down the road."

The property features rooms inspired by the beavers' den and Mr Tumnus' cave from Narnia.

It also includes a nod to CS Lewis' old Oxford pal and drinking buddy JRR Tolkien, as the lights are switched on by placing the 'one ring' next to a copy of The Lord of the Rings.

The Narnia-inspired treehouse was the brainchild of Dr Yaz Romahi

The treehouse, which Dr Romahi built just outside of Oxford, was originally used by his charity, the Congenital Anaemia Network, to entertain children diagnosed with the condition and their parents.

"It can be quite lonely and so it was an opportunity to really get all the children that suffer from these congenital anaemias together, get to know each other, get parents to get to know each other," he says.

"The most meaningful thing to us is really about the impact on patients through the charity."

But Dr Romahi's Narnia treehouse isn't the only unique and creative property that can be found in the Oxfordshire countryside.

'We get loads of people popping the question here!'

You'd be excused for thinking you were in a 1960s sci-fi film if you stumbled upon the spaceship-like structures dotted around a small forest in north-west Oxfordshire.

You'd be forgiven for thinking that an alien invasion appears to have started in the Oxfordshire countryside

But these structures in Cornbury Park, near Finstock, are in fact specially built treehouses that were the brainchild of Tim Rees.

"Treehouses are just wonderful - I think there's a child-like desire to go in something unusual like a treehouse and it brings back a lot of childhood memories for a lot of people - having built their own," he tells the BBC.

"We've got this notion of going forward to nature, as opposed to back to nature - and what I mean by that is we can experience all the best that mother nature has provided whilst also having the creature comforts."

Bart Simpson never had a treehouse like this one!

He adds that the treehouses enable you to "see the world slightly differently".

"It just feels precious."

Now "precious" isn't a word you would normally associate with an old disused railway tunnel just outside of Banbury, but that didn't stop Brendan and Catherine Jenkins from turning it into a popular holidaying spot.

Guess what this used to be...

"We believe that the railway opened in the early 1900s and it was the main Banbury to Northampton line," Mr Jenkins says.

On why he thinks the property appeals to holidaymakers, Mr Jenkins says: "I think it's just the unusual factor that there's a history there - for example in the tunnel you can lie there, you can look at the brick work on the roof and you know it's a tunnel from the second you walk in the door."

The former railway tunnel was built in the early 1900s

Just down the road in Blackthorn, near Bicester, Alan Chapman and his wife Cristina have converted an 18th century windmill into a home with panoramic views.

He says: "The windmill is about 320-years-old, nobody knows exactly what year it was built, but history says it was about 1700.

"It was last used as a windmill back in 1874, sold at auction and lost its cap in the war effort in '43 and in 1998 it was rejuvenated and brought back to life."

The windmill is just outside of Bicester

It appeals to people because "a lot of people are looking for a change, everybody's looking to make new memories," he says.

He adds: "We get loads of people popping the question here!"