This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

What may be Boston's finest Art Deco building, located in the city's Financial District.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

Dedicated to one of the darkest moments in Irish history, this memorial has faced its fair share of backlash.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

One of the indelible moments of the American Revolution took place at this location.

This unassuming stone commemorates a condiment factory gone up in smoke.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

The shop where the girl who inspired the beloved character once bought sweets is now a book-themed commercial curiosity.

This nondescript building was the birthplace of Morris cars.

Memorial to a beloved puppeteer as well as all street performers.

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

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

At the time of its completion, it was the tallest dam in the world.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

This supermarket is suspended 25 feet above an interstate highway.

Perhaps the most scandalous statue of America's first president.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.