On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

Why have you never heard of the second most popular tourist site in New York?

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

"A hideous albatross in the Hudson River Valley."

Three columns of volcanic rock shoot out of the ocean.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created with the discharge from a geothermal energy plant.

A spiritual vortex among the red rocks in Sedona.

This impressive Boston holy house is the American mecca for Christian scientists.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Two thousand artifacts from around the world collected by one woman who loved to travel.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The library of every book lover's dreams.

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.