The "Mother Temple of the Pacific Islands" stands at the center of 20 acres of lush, tropical prayer gardens.

A museum now occupies the mansion in Samoa where the prolific Scottish writer chose to spend the last years of his life.

The world's most remote airport.

A volcanic crater that visitors can look inside.

The largest stone moai on Rapa Nui.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

The national park was once a plantation estate.

Decades before the scandal, this staircase on the river was a literal "water gate."

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

A portal into the bricked up canal that runs through the heart of Washington D.C.

Before Nixon, "watergate" meant canals.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Dedicated to the man who created the first radio wave communication system.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

Built by the patriotic residents of Boonsboro in a single day.

Bizarre Cavern.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.