This Mexico City subway station will make you feel like you've been transported to the London Underground.

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

The faint remains of a Polish news empire still linger.

Odd, decrepit fountain honors Chicago author who had mixed feelings about his hometown.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

To find the "unicorns of the deep" you've got to go downstairs.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This historic hotel invented the chocolate brownie.

An enormous park-like oasis, full of famous Chicagoans' graves.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

An antiquated German apothecary on Chicago's North Side.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A faux European lane smack dab in downtown L.A.

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

The curiosities and wonders of pharmacy in a delightful historic building.

The greatest collection of New Orleans masking and processional traditions covering everything from Baby Dolls to Skull and Bone gangs.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

A unique botanical garden housed in three giant geodesic domes.

Dozens of lights dangle from the branches of what may be the brightest tree in Los Angeles.