God's Saharan sandbox of wrath.

This abandoned bunker looks out over the Atlantic from its clifftop perch.

Despite a fraught and controversial history this African island holds a powerful monument to the tragedy of the slave trade.

Over 4,700 miles of trees being planted to hold back the desert.

This deceptively salty lake looks like blushing pink lemonade.

An island made out of shells, including a cemetery.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Unique house covered in a nightmarish mural of demons, ghosts and monsters.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

A church of bones, decorated with 40,000 human skeletons.

A surreal statue honoring Prague's favorite literary son.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

A former squatter's paradise outside Prague.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Monument to a suicide protesting the Soviet invasion.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Looming communist pillar with a Czech twist.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

What looks like a suicide in progress is actually a statue of Sigmund Freud.