Peek through a transparent pyramid and drink in the mountain made of books.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

Mysterious rocks that ring musically when struck.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

A completely round house designed for the Atomic Age.

Museum dedicated to awful artwork.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

The only museum with its curator—and her pets—buried inside.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

The plague quarantine island home to the alleged "Vampire of Venice."

This historic Canadian jail was once the longest operating prison in the country and is now open for people to incarcerate themselves.

This former prison now houses a lovely library devoted to Quebec's oft-maligned English-speaking history.