Visit a prison tower used during witch tribunals.

Iconic rock formations that allow for exploration during high or low tide.

A centuries-old quest to create artificial life is alive and well in the French town of Limoux.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

One man's dream has turned into this naturally growing chapel made of almost nothing but trees.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Walk down these stairs to get an underwater view of Switzerland's Lake Zug.

A letterpress workshop committed to the art of printing, with unique and creative designs.

This candy-colored storybook village originated as a 19th-century Methodist campground.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

The first skyscraper to include a Ferris wheel built into the facade.

Hidden in an enchanting ravine, numerous mysterious sandstone grooves hint at ancient pagan rituals.

This observation tower is one of two of its kind that still exist in the United Kingdom.

This letter written by Queen Elizabeth II in 1986 won't be opened until 2085.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Lake within a lake.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

This magnificent brick dome was made with an unusual design method.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

An Aztec snake god has taken the material form of an apartment complex.