A luxury hotel constructed out of a former jail.

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

The site of Paul Revere's historic two lantern warning.

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

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

Wine bottle sculpture with a ship's stateroom inside.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

A very classy 1920s-era bar right in Grand Central Station.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The home of the first American-born saint is one of the only curved buildings in New York.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

Visit the monolithic tomb of America's most famous general.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Bowl in splendor, if you're lucky.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

One of England's most famous churches hides a pair of little known architectural treasures.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.