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

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

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

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

This public elevator links the lower city to the upper city of Salvador.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

A 125-meter long "tribute to the Brazilian people."

Beautiful public park off the beaten path and away from tourists.

This Brazilian town built by Freemasons is full of colonial Masonic architecture and symbolic imagery.

This majestic building, where Brazil's coffee brokers once bought and sold beans, now houses a coffee museum.

Museum precariously perched on a massive yellow pillar.

Solitary monument dedicated to the beauty of nature.

As one of the world's largest hydroelectric dams this plant took two countries to get built.

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

Be on the lookout for the symbolic insect all over the city.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

Meet the bronze beloved pet to a family of famous peeing statues.

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

Eighty million natural history specimens call this gargantuan museum home.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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.