An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

According to legend, Bob Dylan sneaks in twice a year to eat dinner with Jack.

Mysterious craters may have been home to an ancient cult.

Historic slum of Tartu.

Brussels' favorite peeing boy has a sister.

Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.

Most prolific publishing house in the 1600s open to the public.

Cozy basement bar sports an inventory of over 2,000 beers.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

Six turbines towering over a wide road for passersby.

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

Macabre astrological automaton clock dating to the late 1400s.

A huge musical instrument played by the ocean.

Where cemeteries are carved into the side of cliffs and infants are buried in the hollows of trees.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

Think you have a tough job? Try carrying 200 kilos through a cloud of sulfur down the side of a volcano.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

Hundreds of Buddhas in a re-discovered Indonesian temple.

Subterranean place of worship in Indonesia.

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.