This singular art museum in São Paulo is unique inside and out.

An international border crossing near the famous Iguazú Falls where bargain hunters and curious tourists stream between Brazil and Paraguay.

Constructed on the ruins of a convent, this tower saved countless lives.

The longest sea beach in the world can be found on the southern coast of Brazil.

Museum precariously perched on a massive yellow pillar.

Solitary monument dedicated to the beauty of nature.

Danish children are taught that Santa lives in Greenland, at this exact cabin.

A remote Arctic museum focusing on the science of icebergs and the archaeology of an ancient Inuit settlement which lies just outside its doors.

These spectacular ruins were built by Spanish padres in the 17th century.

Of the many Jesuit missions in South America, this complex is one of the best preserved.

The Church of the Annunciation was carved into the face of a cliff, just like the rest of the town of Haute-Isle.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

An ancient Greek monument and a Byzantine church coexist inside this cave.

The site where the summer solstice helped ancient Greeks sync the lunar and solar calendars.

A Byzantine-era church hidden in a wooded area below the Acropolis.

These caves secretly held national treasures during World War II.

An ancient octagonal weather station named for the eight Greek gods of wind.

Legend says this sacred tree was a gift from goddess Athena.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The ruined doorway is a portal to the building's turbulent and torturous past.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.