A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

Not quite the menace it once was, this monster still has some chops.

Just another ancient, mysterious Irish stone circle.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

One of the few places where inexperienced snorkelers can spot a shark.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

The people's champion of the French Revolution was so overcome by grief at his wife's death that he exhumed her in the dead of night to make one final replica of her face.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

A quirky and charming restaurant founded by artists.

A no-frills, DIY nature preserve manned by a U.S. expat who has dedicated his life to turtle conservation.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

A display of magnificent stained glass windows is the first exhibit of its kind.

One of America's first planned communities is preserved in a state park.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

A reportedly haunted 14th century church is curiously facing the “wrong direction.”

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

This small stone chapel is a hidden gem just outside the University of New Hampshire campus.

Some of the best-preserved specimens of the monumental medieval tombstones found throughout Bosnia and Herzegovina.

A Neolithic burial site built 1,000 years before Stonehenge.