A particularly disconcerting tribute to Irish martyrs.

The modern birthplace of Irish freedom.

London's smallest police station is barely the size of a phone booth.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A mysterious spot where the laws of gravity seem not to apply.

A line of blue paint marks the route of the inaugural parade.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

The 28-foot granite map plots the locations of 40 theaters in New York City.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

The world's largest wooden structure.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

A former major munitions plant that has been converted into a sprawling art space.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

The only town in the world with two exclamation points in its name.

Two thirds of this Montreal neon icon has survived to flash another day.

This expansive bridge in the Canadian wilderness was originally just built for friends.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.