Well we have all heard of Trump Tower. How about Cocks' Tower?
Before the uninitiated wonder why anyone would want to "attract" wasps and bees, it should be noted that these insects are "solitary". This is opposed to "social". Solitary bees and wasps are just that. They do not make communal nests with hundreds or thousands of individuals. The social bees, honey bees, for example, produce nests that should be kept well away from habitations etc.
Anyone can make a wasp or bee hotel. All you need is a drill. The one above measures about .5m in length and is about 65 mm deep. holes of different sizes will attract wasps and bees of different sizes.
All you have to do is hang one out and wait. Eventually someone will find it and begin to use it. If there is no interest on the part of the wasp and bee community, then move it to another location. These insects seem to like a bit of sunlight. Bee hotels kept in the shade seem to be ignored.
What can you attract? Well there is a great variety of these insects, perhaps more than you think. And with them come the wasp and bee parasites. But you have to keep on the lookout. That's why it is a good idea to have the hotel near a window or walkway where it can be more or less continually observed.
Here are a few examples that have shown up thusfar.
Usually the wasps provision their nests with paralysed insects. The most common prey is caterpillars. Many wasps collect pollen and honey with which they stock their nests. In this instance I observed no prey being brought to the nest. Maybe next time.
Sphecidae. This is a diverse group of wasps and many its subfamilies are now transferred to another family, the Crabronidae. Whichever classification you choose, it is a very large group of wasps with species ranging greatly in size and biology. They are predatory and utilise a variety of insects and spiders to provision their nests.