The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Washington's iconic carousel has a nice piece of Civil Rights history.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

"X" marks the spot of an echo chamber in the middle of a plaza.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

St. Augustine's record-setting narrow street was designed to protect against pirates.

Location of a reliquary containing bone fragments of 18 saints.

The home, museum, and death site of Kodak's influential founder.

The seat of Buffalo government is a gorgeous Art Deco palace.

Where Venice's gondolas go for a tune-up.

This artistic temple brings together multiple architecture styles, but is only an example of one.

The home of a neoclassical master is now a shrine to his chosen art style.

A sudden, striking cluster of hills south of Padua has been attracting visitors for centuries.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

During World War II, this rice mill became a Nazi concentration camp.

The oldest botanical garden in the world that technically isn't the oldest.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

This military mausoleum captures the solemn grandeur that most memorials only aspire to.

Europe’s oldest natural human mummy.

100 year tradition of fist fights, marked by marble footsteps.

One of the largest caves in the world open to the public.

Five candy-colored villages on the Italian Riviera.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.