In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

This floating sculpture of ice is a poignant reminder of nature's power.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This Arctic storage facility is a secure backup for agricultural biodiversity.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

In Stone Town, Zanzibar, the city’s culture and history is told through its doors.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

This 19th-century prison once held Irish revolutionary Constance Markievicz, writer Frank O’Connor, and a nine-year-old pickpocket.

This Irish museum in a historic 19th century market pays tribute to the glory of butter.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This cheese shop also houses a museum devoted to Dutch dairy.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

This tribute to a local man towers within a quaint lakeside park.

The park is home to the United States's only still-operating Dutch windmill.

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

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

An eccentric inventor's castle home with its own indoor weather system.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A historic Montreal market that was the city's agricultural hub for over century.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.