A vast necropolis where you'll find the elaborate mausoleums of Argentinian tango stars.

A vibrant street away from the typical tourist track, lined with colorful, mosaic-covered houses.

You have to know where to look in this rather ordinary-looking square to find hints of its past as a dissidents' cemetery.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

A bright little alley in La Boca is a part of tango history.

A gateway to a mysterious network of underground tunnels.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

An abandoned town is hidden in Great Smoky Mountains National Park.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

This historic mansion was built as a symbol of love between a husband and wife.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

On the side of a Virginia highway, a collection of monuments commemorates an 18th-century trek through the Blue Ridge Mountains.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

One of the last active volcanoes on the Eastern seaboard.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

The only recreation of William Shakespeare's indoor playhouse.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

The oddly shaped, steam-spewing building is now an art studio and gallery.

The hide of Stonewall Jackson's equine sidekick is on display not far from where the ashes of his bones are buried.

The final home of the most famous horse of the American Civil War.