This strange building looks like a medieval fortress crashed into a 1960s Brutalist office block.

A jaw-dropping brutalist space church seems to have crash-landed in the middle of America.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

An exquisite and eclectic selection of African masks stands out within a massive woodcarving marketplace.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Some believe this abandoned Brutalist masterpiece inspired George Lucas's Sandcrawler.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

A rare remnant of an exposition that took place nearby at the end of the 19th-century.

This unique sculpture is often overlooked by pedestrians.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

Venice's island of the dead.

This sturdy, circular stronghold served as one of the forts that protected the Venetian Lagoon.

This former church is believed to be one of the first Christian sites in Belfast Lough.

This unique formation is characterized by hexagonal basalt rocks stacked in unique formations.

Inside this medieval church resides a unique set of murals.

A quiet spot commemorating two naturalists who had to choose between love and the university at which they both taught.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

A colorful architectural gem in Seattle's uniquely modern Central Library.

A stone wall commemorates the legend of a ferocious dragon who literally got his butt kicked by a knight.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

A once-fairy tale mansion now stands in a state of disrepair.