An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Housed in an old British jail, this spot serves up Georgian, Russian, and Ukrainian specialities with a side of Turkish history.

A damaged tree turned into a whimsical giant pencil that is sharpened each year.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

This public park was the site of the largest civilian disaster of the Civil War.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Line up for a hickory-smoked BBQ bologna sandwich at this family-run institution.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

A trailblazing sovereign nation tucked in the American state of Wisconsin.

Statue dedicated to the star of an old television show.

This was once the largest four-sided clock in the world (yes, even bigger than Big Ben).

This unassuimng grain elevator, commonly confused for a smokestack, helped inspire the modern architecture movement.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

The last location where Buddy Holly, Ritchie Valens, and J. P. "The Big Bopper" Richardson played before their tragic deaths.

Largest gathering of hobos in the country has been meeting annually since 1900.

The center of the only hemisphere that awards visitors with a commemorative coin.

These subterranean storage areas hold emergency water reserves.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Get a taste of Chamorro cuisine, family-style, at this popular restaurant.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

A legendary music collector donated his entire collection to the entire city of Memphis.

An old bank vault in Atlanta is now the eternal shrine to the King of Rock and Roll.