This is the striking (and huge) Ryugyong Hotel in Pyongyang, North Korea. It’s a 330-metre-tall pyramid-shaped building with 3,000 rooms, and was supposed to have 7 revolving restaurants, except they never actually finished it. Wikipedia says:

newspapers estimated the cost of construction was $750 million - 2% of North Korea’s GDP - and it is generally assumed construction came to a halt in 1992 due to lack of funding, acute electricity shortages, and the prevailing famine.

The building itself is complete, however it has no windows, fixtures or fittings - which makes it officially the world’s Tallest Unoccupied Building! In fact, it’s the tallest building by far in North Korea, the 18th tallest building in the entire world, and if it were ever to be completed, would be the world’s tallest hotel. Here’s a picture which really gives you a great impression of scale.

Thanks to Keith T, Soren Ragsdale, Josh Weinberg, zmaster and Jon Gaspar.

In our never-ending quest to catalogue everything that stakes its claim to being the “world’s largest something” I present to you the world’s largest dry dock.

Located in Belfast’s Docklands (where the ill-fated RMS Titanic was built) the dry dock is part of the Harland & Wolff Shipyard who also operate the two gigantic yellow cranes, Samson & Goliath. UK readers might recognise the area from a BBC ident that showed skateboarders doing tricks underneath the cranes.

To the west is the ferry terminal where you can see a Stenna Line Ferry which operates between here and Stranraer in Scotland. Submitter Chris had this to say:

This ferry is possibly the Stena Caledonia which crosses in 3 hours 15 minutes. The newer high speed Stena Voyager (HSS) also travels this route taking 105 minutes for the trip.

Thanks: redstar1 & Chris