The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

The hottest, driest, and most scenic desert on Earth.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

Cherry blossom season comes early in this Japanese town where pink flowers line the streets and riverbanks.

China’s breathtaking futuristic library is lined floor to ceiling with fake books.

The remains of the oldest synagogue in Britain lay forgotten for seven centuries, hidden under a humble shop.

The world's largest indoor go-kart racetrack is hiding in Connecticut.

These sacred totem houses connect the Fatakulu people with the spirits of their ancestors.

The remains of a magnificent medieval fortress that was the capital of a vast empire.

The steepest classic funicular in the world glides along a dizzying incline.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

Why walk on this historical site when you can zoom down instead?

The world's fifth tallest waterfall is a spectacular silver chute of water that cuts through the cloud forest in northern Peru.

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

The stunning interior of this Gothic church is covered in ornate gold details.

This striking icon of the disputed Republic of Artsakh caused a stir at a Eurovision Song Contest.

Romans built the world's tallest artificial waterfall in 271 BC.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

This underwater cave in Madagascar is home to what is thought to be the country's largest fossil graveyard.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

The sacred shrine of the Yazidis.

Bacteria and algae give the salty water its bubblegum hue.