Made by a man on a worldwide sanitation crusade.

An artistic tribute to the famous singer, just around the corner from where he was born.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Hear the quietest sound from across the dome.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

This monument to one of the largest science fiction games of all time bears the names of hundreds of thousands of players.

This stunning concert hall has become a symbol of Iceland's national recovery.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

Steaming blood-red hot spring from hell.

This historic observatory contains the world's oldest refracting lens telescope.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Hot springs monkey spa in the middle of Hell's Valley.

This isolated Japanese mountain village untouched by time showcases unique and stunning traditional architecture.

A beautiful bamboo trail tucked in this famous Japanese Shrine.

Hanging over one of Japan's "hidden valleys," these vine bridges must be remade every three years.

A statue erected on an infamous cliff where young boys would hold dangerous "pee offs" to prove their mettle.

The world’s largest work of glass art hides in this stunning Taiwanese subway station.