Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

This unique zoo is the only place in the world where you can see all 15 species of crane.

A large circus museum with summer performances.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

This cave holds a surprisingly colorful variety of geological oddities.

A bypass decorated with large wooden troll carvings.

Three playfully immersive mini golf courses let you travel alongside your ball to the cup at this facility, which has been around since the 1950s.

A largely forgotten and touching neoclassical marble fountain overlooking a bear mound effigy.

The arboretum whose marshy soil sucked up the dreams of housing developers.

The tunnel that runs beneath this former inn was once a hiding place for enslaved people seeking freedom.

America's only nuclear missile silo open to the public.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

A coal fire has been burning underground here since 1896.

Explore a wealth of fossils in one of the most prolific dig sites in North America.

In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This sidewalk tribute honors Colorado's great culinary creation.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.