These engineering masterpieces are a dominant feature of the Belfast skyline.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

It was once nicknamed "the most bombed hotel in Europe."

Quito's historic, main square dates back to the 16th century.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

A huge, bustling local market in Panama City.

A crumbling cathedral condemned by an earthquake.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

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

The national park was once a plantation estate.

The oldest continuously operating fish market in the United States.

Now a living classroom, this house was once the home of Reverend James Clinton Dent, a formerly enslaved man and a pastor.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

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

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