A spiritual sanctuary in a natural cave.

An abandoned monastery sits on a far-off island in the Adriatic Sea.

The collection of signage remembers the midcentury pushback against the new neon light.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

A high point in Vancouver kitsch.

Traditional 15th century Chinese garden in the middle of Vancouver.

Locals transformed this Canadian evergreen into a secret hangout with spectacular views of Vancouver's skyline.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

This small enclave plays host to a house, church, and wishing well all composed entirely of recycled glass bottles.

Mysterious concrete spires left on a small Canadian hill.

The world’s first museum dedicated to exploring human rights unleashed a wave of controversy.

This hermitage celebrates the legend of Emperor Constantine's healing from leprosy.

One of Rome's most picturesque and original bridges was also a popular choice for Grand Tour artists.

A colossal aqueduct from the second century B.C., deeply hidden in a gorge on the outskirts of Rome.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

A massive marble foot is tucked away in a small alley near the Pantheon.

This ancient Roman arch misled treasure hunters for centuries.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

A burial vault located under Tiber Island in the middle of the Italian capital.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.