This historic headstone is said to mark the final resting place of a doubly-dead white witch.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

A medieval military street hidden beneath a charming French fishing village.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

These large-scale reproductions of Mario Sanchez’s colorful pictures and murals feel like a walk around a small movie set, and also lead you down an imaginary “street” of past decades.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

Single runway interrupted by a busy road that cuts across its middle.

A complimentary beverage is offered to the bodega's resident rodents every day.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

The world's most elegant power lines.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

These former theme park figures have a new lease on life outside a water plant-turned-restaurant.

This sculpture is one of many stunning features along Tampa’s Riverwalk.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Breathtaking and huge 430 year old maps of Italy.

These unusual rooms on wheels are holdovers from the 1960s.

The famous sculptor had a hand in this imposing fortress.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.