The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

The first park built over a freeway is a brutalist masterwork.

Detailed facade of a brownstone in Boerum Hill.

The world's largest squirrel statue clutches a pecan bigger than your head.

This tiny museum's sizable collection is jammed into a former underground public toilet.

A private collection of massive steel monsters guarding a Texas pipe works.

A bit of retro transportation flair preserved in the world's largest department store.

A Memphis park where you can walk the whole Mississippi River in one go.

The site of one of history's most indelible and horrific tragedies.

Visit the monolithic tomb of America's most famous general.

An artist's cute bronze subway sculptures belie his violent artistic past.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The most famous location in China was home to whole dynasties worth of imperial rulers.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

A unique sculpture park that specializes in the huge and bizarre.

The highest point in Washington state is a volcano covered in glaciers.

A motel dedicated to Southwestern nostalgia.

An underground magnet for ever-changing street art.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The oldest church in Iceland is one of the few to feature ornate decoration.