A World War II evacuation tunnel turned into a history display of Croatian state and people.

These lamps were created to expel sewer gases after an event known as The Great Stink.

A rather grand, but tiny, folly on the banks of the River Wear associated with a Polish count.

This Roman archeological site is hidden amid a 1930s housing estate.

This letter written by Queen Elizabeth II in 1986 won't be opened until 2085.

The red crab exhibits one of the most spectacular migrations on earth, despite manmade obstacles.

One of the few places in the world home to living stromatolites.

Dive for drinks at Croatia's first and only underwater winery.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

The much-beloved mascot of a local museum.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

This giant wooden treehouse within a sprawling garden has its own eatery.

Take afternoon tea in a 17th-century almshouse.

The 2,000-year-old pieces of metal are an ancient soldier's military discharge papers.

This 135-year-old weather station studied the effects of the climate on human health.

Where the lovelorn find a home for their sentimental keepsakes.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

An Australian lake whose pink hue defies scientific explanation.

Living fossils in this remote Australian bay provide a glimpse of what Earth may have looked like 3.5 billion years ago.

Inside this sculpture park are dozens of woodcrafts crafted by the gentle hands of a chainsaw.

This Singaporean food-court stall was home to the world's cheapest Michelin-starred meal.

A gorgeous gilded tower houses what may be the world's largest collection of gin.

Microscopic fossils suggest Australia may be the birthplace of sulphur-based life forms.