This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

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

The "dragon babies" of southeastern Europe.

A miniature train-ride through Slovenia's largest cave system.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

The ancient tomb acts as a calendar that keeps perfect time.

A statue honors the children who fought Nazis in Poland.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A national collection of Communist-era musical posters.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

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

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A 20th-century picture show in 3-D.