Singapore's landscaping project is home to 18 incredible Supertrees.

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

A memorial to the victims of Argentina's "Dirty War."

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

Breathtaking and huge 430 year old maps of Italy.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

A bright little alley in La Boca is a part of tango history.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

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

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

A huge boat-shaped hotel with a blood red pool and other oddities.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This Neolithic passage tomb forms part of a World Heritage Site.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

An ancient neolithic tomb that only sees the sun twice a year.

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

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

A little sculpture with a large wardrobe.