Krakow's own version of the Hollywood Walk of Fame.

Inside this Krakow church, an explosion of psychedelic color.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

Palace where the nearly un-killable Rasputin was murdered.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

What happens when you cross a mayor and a painter?

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

One of the largest squares in Europe contains an entire artificial island.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

The oldest botanical garden in the world that technically isn't the oldest.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

The last home designed in its entirety by noted architect Luis Barragán owes its existence to an impressive jacaranda tree.

Murals made with millions of colorful stones adorn the abandoned building.

Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.

The famous artist couple lived and worked here, in two different houses connected by a bridge.

Come for the flowers, stay for the bats!

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

In a narrow river valley just north of Beirut, Lebanon, is a chronicle of human history unlike anything else in the world.

One of the world's best-preserved Roman amphitheaters is also one of the most unusual; it's made of black volcanic rock.

America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.