This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

Amazing views of Long Island Sound can be seen from this mountaintop tower.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

This classic steam-powered train takes tourists on a nostalgic trip around the Connecticut River Valley.

Connecticut's shot tower is near the end of its life.

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.

House used in the 1971 horror film "Let's Scare Jessica to Death."

British troops and Prohibition couldn’t stop this spot from becoming one of the United States' oldest continuously-run taverns.

The oldest place in Hartford is a cemetery with thousands of bodies stacked beneath the grass.

This roadside wonder is as mysterious as it is beloved.

This small-town pizzeria won the Hollywood lottery.

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

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Eat the ultimate iteration of Portugal's most beloved pastry.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.