This large, circular tomb is the final resting place of the first emperor of Rome.

A contemporary art installation housed within a Gothic cathedral.

Largest Roman Catholic church in North America.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

A small cell adjacent to this church was once the bedroom for a renowned saint.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

The romance of early commercial flight still fills this Art Deco destination.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

At 207 feet, one of the world's longest continuous escalators.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

A shrine built to combat the bad karma of a commercial venture.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

The unassuming structure was part of a Major League Baseball stadium.

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.

A much-loved local landmark pays tribute to the shipbuilding past of this area.

The longest step street in the city.