Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Go inside to really appreciate this 500-year-old technological masterpiece.

Secret refuge and museum of the Duke of Florence.

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

A bright little alley in La Boca is a part of tango history.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

A tower devoted to — and modeled after — the Divine Comedy.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

A living time capsule of the 1960s Richardson Bay water-front.

Concrete strongholds stand guard over the Golden Gate.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This private residence was the template for one of the most beloved television homes of all time.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

Open day and night, a church with three pews and Bibles.

This popular bar has been blurring the line between normal and edgy for more than 75 years.

A museum dedicated to the history and exploration of both popular music and science fiction.

A wall of chewing gum moonlights as collective art.

Location of a reliquary containing bone fragments of 18 saints.

A tribute to Ponce de Leon's supposed quest for eternal youth.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.