Tjep.

The 'Lucky Building' in New York City: "[a]nd who would want to crash a plane into such a friendly looking building...," indeed.
New York City skyline received this makeover from Tjep., a Dutch design studio formed by Frank Tjepkema.
(A while ago, Gem featured another Tjep.'s project.)
Note that dot: not 'Tjep', but Tjep. is the name of this studio with a dot on elegance, technology and poetry.

De Batavier outdoor library

This library of 250 ceramic books in the facade of De Batavier was created by Sanja Medić, an artist resident in Amsterdam. It was commissioned by the housing organisation De Alliantie and HVDN Architects in the process of developing a new residential building in Lootsstraat in Amsterdam.
The streets in this neighbourhood in Oud West are named after the Dutch poets and writers, and the titles on the spines of the books are taken from the works of these same authors.

Ark

This stunning archaic 'Ark House' - to be beached on a mountainside of the Montana Plains - is developed by the Axis Mundi architects.
The residence takes up only one half of this structure: note the giant observation deck (of nearly 4800 square feet).
A sailing vessel on the dunes of wrath.
Breathtaking.

Elevated hanging houses

This is Andrew Maynard's plan for the second generation Styx Valley shelter for Greenpeace activists. The Styx Valley Forest is a forest of old in Tasmania, with 400 years old trees that are now at average higher than 80 metres. The survival of the Styx forest is being threatened by the logging companies. A large group of activists formed human barricades to halt the entry of bulldozers and log trucks. The activists were to date living in the first generation elevated tree houses. The second generation tree houses developed by Andrew Maynard are hugely improved and enable a more permanent living.

There goes Terunobu

A 'takasugi-an' ('a teahouse [built] too high') is a tea-house on high stilts built by Terunobu Fujimori, a professor of architecture at the University of Tokyo (2004). Fujimori chose to implement his dream tree house on the garden of his father who, upon seeing his son's creation, sighed: 'There goes Terunobu, making something wacky again.'