At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

This church carved into the rocks is full of enchanting stone statues.

After a traumatic encounter with a six-foot eel, one Galway baker started making a daily loaf of sourdough in its shape.

England's most famous front door has an accidental doppelganger.

This popular cave pool is truly magical, despite the crowds.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

These ruins of a medieval church are full of architectural mysteries.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

These legendary stone steps were once used to haul coffins up the rockface.

The world's only pure blue lizard lives exclusively on this secluded tropical island.

The commemorative stone column conceals a secret laboratory.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

These otherworldly caverns form Earth's oldest known cave system.

At this sweet shop, the descendants of a royal chef serve up the fudge-like dessert his ancestor invented for a king.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

World's largest cave was only discovered in 1991, and now offers tours to the public.

This spectacular track has run continuously since 1882.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

The oldest pastificio in Queens offers visitors fresh noodles and a peek inside the macaroni-making magic.

You'll find the little birds tucked within the rocks of this Australian beach.

Wander among the abandoned ruins of this once-powerful medieval town.

The unexpectedly beloved remnants of a controversial thermal power plant.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.