An encyclopedic collection of mammal penises.

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

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Artist Jack Pierson made this surreal sculpture in honor of Wonder Valley, a countercultural community on edge of civilization.

Meet 'Big Josh,' the 20-foot-tall muffler man.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

There aren't too many operational funiculars around, but Pittsburgh has two!

Only a shrine remains at the site of the catastrophic nightclub inferno that killed 100 Great White fans.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Avoid gangster interaction while window-shopping.

Dine on dumplings at the oldest dim sum restaurant in New York.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

A room in New York City that contains 250 cubic yards of dirt.

One kilometer of thick brass rod laid out before your eyes.

Lie in a hammock where George Washington stood.

Elevated freight railway turned wildly successful urban park.

Sip a cappuccino in the historic cafe that introduced them to the United States.

An aptly-named street near the birthplace of the modern LGBT rights movement.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.