The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

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

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

An enormous, inside-out glass globe built in 1935.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The site of Paul Revere's historic two lantern warning.

A whimsical bridge adorned with decorative dragons.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

An ancient Egyptian temple in the middle of Madrid, Spain.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

The ghost town that ended up on Ebay.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

The magic's in the hole!

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

The oldest Roman lighthouse still in use.

This enormous censer uses a pulley system installed over 400 years ago.