A particularly disconcerting tribute to Irish martyrs.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

An encyclopedic collection of mammal penises.

Medicinal spa created with the discharge from a geothermal energy plant.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

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

The face of a woman pushes its way through the earth.

Cold War missile launch site which has been converted to a public park.

People escaping slavery passed through the oldest house in Lombard, Illinois on their northbound journey to freedom.

This botanical garden outside Chicago boasts an array of more than 300 varieties of lilacs.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

The only rotating bar in New Orleans has been slowly spinning since 1949.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

The palatial McDonald's that inspired Wesley Willis.

The famous author's birthplace is preserved in a town that he once described as narrow-minded.

Chicago’s incendiary role in the labor movement.

The clothes-washing king doubles as a community center with some unusual features, including an aviary filled with finches.

A plaque marks a former safe house on the secret route, now hidden next to a McDonald's.

Pumpkin-like gargoyles and grotesques peer down from the rooftop of this unassuming apartment building in Illinois.

A monument to the art of slicing people open.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.