One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A shrine built to combat the bad karma of a commercial venture.

Equipped with thousands of LED lights, this geodesic dome-shaped stadium is an engineering delight.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

A glowing underwater cliff attracts marine life and divers in equal measure.

Rome’s legendary peephole vista is also a former Crusader stronghold.

These spartan apartments are provided to clergymen visiting Vatican City.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

One of Mexico's youngest major cities still holds on to this structure representing its short modern history.

This historic spot was where America's involvement in the Vietnam War officially came to an end.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The celebrated eyesore created by starry-eyed sweethearts.

This bridge was constructed from the rubble of the infamous Bastille.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Hundreds of hidden passageways weave through the old quarters of Lyon.