An encyclopedic collection of mammal penises.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

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

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

One of the first major shipyards in Brooklyn.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

Four cars from the old system were once on display, but were removed in 2014.

All that remains of a magnate's dream home is a historic gate and an abandoned public pool.

Collection of antique science instruments displayed in recreated 1870-1930 laboratories.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

These expertly crafted, scientifically accurate glass sea creatures were once an international phenomenon.

A graffiti Mecca welcoming artists from around the world.

An accidentally hidden library containing the ephemeral history of New York.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

The best place in New York to pick up the controversial, notoriously foul-smelling Asian "king of fruits."

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

Tucked in the back of this amazing antique store is an important piece of medical history.

A restored Shell gas station from 1937 that includes a tow truck, the original gas pumps, and the original office.

The only subway station in the city that still makes use of gap fillers.

One of the largest public housing complexes in New York once visited by Eleanor Roosevelt.

The highest natural point in New York City and all of the Atlantic coastal plain.

The longest step street in the city.