The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

The widest natural waterfall in Estonia is a sight to see in all seasons.

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

Once one of the largest producers of pig iron in the world.

One person's lost luggage is another person's treasure.

A blooming house of worship for the masses.

The world's second-largest sundial, made entirely out of stone.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Medicinal spa created with the discharge from a geothermal energy plant.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

The massive white mound and accompanying water terraces are a striking geological oddity.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A vast and unlikely aviation museum kept alive for over 50 years due to one man's tenacity.

This hidden fortress has been coined the "City of Ghosts."

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.

This derelict superstructure was a very important warning system for the Soviet military.

340-foot statue built to honour the Heroes of the Soviet Union.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.