Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

Real bones which are said to have belonged to a Polish dragon.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Northern Ireland's Brobdingnagian stepping stones.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

The site of the one of the most deadly train wrecks in American history.

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

For decades these polar bears have roamed all around a Nashville neighborhood.

It may take some time to locate, but it's sure to warm even a heart of stone.

These unusual rooms on wheels are holdovers from the 1960s.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

A giant cement churn carries the legacy of American resilience, unity, and greed.

This woodland architectural installation acts as a camera obscura for the heavens.