Liberland is a micronation in Southeast Europe claiming an uninhabited parcel of disputed land on the western bank of the Danube, between Croatia and Serbia (locally known as Gornja Siga). It was proclaimed on 13 April 2015 by the Czech activist Vít Jedlička.
My understanding without going deep into it is that after Yugoslavia fell apart the decided border between Croatia and Serbia was Danube river. There is nothing strange in that a river makes a border between two countries, but here Danube changed its course in some period of time (i didn't even manage to find when) So one country set the border on the current course of the river and other on the old one.
And in that, there were 7 square kilometers not claimed by any country. So Vít Jedlička found that info and in 2015 stick a Liberland flag on that land. Not sure how smart was that, but i whish him all the luck.
And while they are juggling with the regulations and trying to get to the land and start building, they build an Ark. A place located near Apatin, close to the Danube river.
The official currency of Liberland is Liberland Merits (LLM). You can also use Bitcoin to pay for stuff in the events they organize.
Liberland quite often organizes events in the Ark. The most famous one is Floating Man Festival. It is an annual event happening in the summer, happening for several years now.
My understanding is that you can stay in the Ark, as they have bungalows, but i am not sure can you book it all year around.
They do have some interesting ideas, with decent amount of problems to solve. But if they manage to do that, it will be interesting to see how a crypto nation can function.