These Stolpersteine located in Spain honor Republican soldiers who perished at the hands of Nazis after the fall of France.

A half-size replica of the World Trade Center towers above Tulsa.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

Its incredible collection preserves 170 years of sewing machine history.

Songwriter Leon Russell transformed this church into a recording studio used by many legendary musicians.

A museum packed with instruments, lyrics, and other mementos of the American folk icon.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

A former chicken restaurant that doubled as a speakeasy is now a quirky home full of wonderfully strange traditions.

These massive mitts are made of 30 tons of devotional bronze.

An acoustic anomaly with a mysterious cause.

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

This magnificent church allows travelers along one of Germany's busiest roadways a chance to rest and reflect.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

This tower was constructed to commemorate the man who helped bring true democracy to the United Kingdom.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

A fifth-century temple improbably built into the side of a cliff.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

A tiny chapel clings to a precipice above Germany’s gemstone capital.

Sleep in a glass pod dangling off a cliff.

This precariously perched fortress was once ruled by a crow-worshipping baron.

A historic observatory precariously perched at the "Top of Europe."

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.