A whimsical monument deep in this park commemorates the groups that helped build it.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

The remains of what was once the world's steepest passenger funicular.

The summer home of the largest colony of bats in the world.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

The largest known open fault in the United States is basically a giant natural refrigerator.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

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

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

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

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

A gas station and a state sign commemorating the most famous claims of extraterrestrial abduction.

A former zoo turned public park, where visitors can hang out in the old animal cages.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

Final resting place of one of the classic authors of horror literature.

This lighthouse was witness to the end of WWII hostilities and now collects creepy cairns.

An architecturally unique lighthouse that had to be lifted up and moved to avoid falling in the sea.