Splash out on a home with a waterfall: $17 million Kansas mansion with everything for sale

Plenty of properties get described as “one-of-a-kind”, but it’s rarely been truer than for this home with the absolute lot in Lake Quivira, Kansas, in the United States.

Let’s start with the house itself, with seven bedrooms and seven bathrooms and several commercial-grade kitchens with a butler’s pantry.

There’s also a two-storey office, wine cellar and walk-in closet system, plus a turreted library extension, which is the highest point in the county, according to the listing.

It’s decked with an assortment of internal features, including hand-carved dragon doors, stained-glass windows, chandeliers, and a pulpit imported from Salem, Massachusetts and a piece of Spanish furniture dating back to the 1490s.

All this is set on seven acres (2.83 hectares) of land with trees and gardens – with “every single species of trees that is naturally able to grow in this region” – snaked by walking paths and golf cart roads and playing host to a four-car garage, a gym, and tennis courts, and a heated swimming pool.

And, the icing on the cake? A nine-metre waterfall, with interlinked scuba diving tunnels dotted with fossils, for all your aquatic adventure needs.

The home, fittingly, has a name – The Spirit of Avalon – and, according to Forbes, was built by the vendor and her late husband, an energy executive and scuba diving enthusiast, who also worked as a speechwriter for US presidential candidate Joe Biden.

The main home was constructed in 1993, the diving tunnels from the late 1990s to early 2000s – growing from the original concept of being able to scuba dive in an outdoor pond – with the library added in 2002, and the total build cost as much as $US30 million.

Now complete, it’s priced at $US11.8 million ($17.1 million), and is the most expensive house for sale in the state at the moment.

The vendor is reportedly opting to downsize.