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

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

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

A striking public sculpture representing the period of martial law in Communist Poland.

These mechanical goats first battled it out in the year 1551, all because of an overcooked deer.

The silly symbol for an underground protest group is now scattered around the city.

The site of the first battle of World War II.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

An ancient Chinese temple where even the emperor dressed like a farmer in the name of the harvest.

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

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

Massive, unfinished broadcasting station stands as a monument to the fall of communism.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

This historic black and white monastery is one of Bulgaria's architectural jewels.

An homage to the medieval rulers of Bulgaria.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

An abandoned saucer-shaped monument in the Bulgarian mountains.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

Go inside to really appreciate this 500-year-old technological masterpiece.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.