A Gothic cathedral created from volcanic rocks.

This ancient theater was once the home of fierce gladiatorial battles.

The disputed geographic center, or "navel," of Italy.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Elevated freight railway turned wildly successful urban park.

The saga of the massive nut begins and ends in Texas.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

The Milburn-Price Culture Museum in Vega offers a brand-name oversized cultural attraction.

World's smallest skyscraper, the product of a remarkable con.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

Whether or not you take the 72-ounce steak challenge, there’s plenty of history, fun and Texas-style food at this legendary stop along Route 66.

Op-art architecture designed for happiness.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Baroque celebration of the end of the Great Plague of Vienna.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Be(w)ar(e) the moat around this historic Czech castle.

A historic and beautiful Art Nouveau chamber in a historic railway station.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.