This medieval city gate is now a blend of the past and the modern world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Romania's triumphal arch looks out over Bucharest.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

This snug medieval lane is one of the narrowest streets in the world.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

When you can't get to the Pacific, just go to Florida.

The timeworn "Yankee Stadium" of the fastest game in the world isn't going anywhere.

"We Seceded Where Others Failed."

An icon among Florida's pre-Disney tourist attractions, just west of Orlando.

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

America's only city hall with minarets took architectural cues from Ali Baba and the Forty Thieves.

St. Augustine's record-setting narrow street was designed to protect against pirates.

An abandoned water sports stadium that has become a haven for graffiti and decay.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.