Jay Z and Beyoncé recently took a holiday on the Galactica Star, an ultra-luxury yacht reportedly owned by Nigerian energy magnate Kola Aluko.

The yacht, which costs £50 million (€65 million, $73 million), is 65 metres in length and can travel at 28 knots (32 mph) in favourable conditions. Because of clever hull technology, the boat is also very fuel-efficient, requiring up to 30% less power for the same speed as boats of a similar size.

The Galactica Star can sleep up to 12 guests with a full-beam master suite, an upper-deck VIP cabin, and four further double cabins. Beyond this, there is a "beach club" with a 10-square-metre balcony, tons of space to entertain guests, and a helipad.

Despite reports that the yacht costs $900,000 a week (£580,000) to charter, it's actually far more exclusive: To stay on the yacht, you also have to know the owner.

Here's what it looks like.