This centuries-old Italian chapel hangs midway down a sheer cliffside.

A dilapidated psychiatric facility on the outskirts of Milan where electroconvulsive therapy was developed and Napoleon once lived.

This poignant art installation raises awareness of violence against women.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

The Swiss hilltop housed an early 20th-century vegetarian nudist colony.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

This small museum displays a collection of outsider art and scale models of past "treatments" for mental illness.

150-year-old satirical tableaus made from stuffed frogs.

This massive sculptural work outside of Paris was four decades in the making—and it's still not quite complete.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

It was once the longest continuously running cinema in the United Kingdom.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

This concept building is the UK's first attempt at making a permanent structure of nothing but trash.

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

Amsterdam's former hotspot for public executions and dissections.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

The world's only museum devoted to the wonders of fluorescence.

A microbiologist-chef is slinging noodles with hyperlocal Nordic ingredients.

Thousands of birds nest in the cliffs while arctic foxes prowl below.

The largest cave in Northern Europe.