This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

On the Hudson resides one of the largest clocks in the world.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

This stunning concert hall has become a symbol of Iceland's national recovery.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

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

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The romance of early commercial flight still fills this Art Deco destination.

The United States Capitol's former columns still stand.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

It was once the base for a series of domestic terror attacks.

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