This wild explosion of color on a disused water tower tells the whimsical tale of a curious puffin.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

One of the world’s largest collections of paper memorabilia chronicles 4,000 years of papermaking.

These four fountains are said to have healing properties, with a glass of the 'miracle' water being given to Louis XII of France.

A Roman spa buried deep beneath the City of London.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

A small pack of an ancient, hairless breed of dog once believed to guide souls through the underworld lives on its grounds.

A world-class theater sits hidden in this remote town in West Iceland.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A lavender labyrinth so large it’s visible on Google Earth.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

At this museum in Iceland, visitors can sample fermented Greenland shark.

This steel frame is a skeletal mirage of a lost 16th-century stone building.

This rickety old shed hides a trove of secondhand literary treasures.

Only 68 people per day are allowed to visit this New Zealand bird-watcher’s paradise.

These wooden balconies that are both decorative and functional.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

One of only five observatories in the world built to measure the Earth's wobble.

Walk through row upon row of manicured miniature trees at the United States' largest bonsai nursery.

This once-private estate is now a dreamy, meditative garden that's open to the public.

Lumps of significant stone from around the world surround a flaming monument for peace.

A whimsical folk art garden full of punny pieces and a diorama containing 3,500 toys.

This remote stretch of sand is a penguin lover's paradise.