The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

This rustic old building is said to be the most photographed barn in America.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

Danish children are taught that Santa lives in Greenland, at this exact cabin.

Where commuters walk through remnants of an ancient Greek necropolis.

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This stone tower was built to protect Crete from incoming pirates.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

Atop this former dutch railway office sits an interstellar work of art.

A pair of black granite tails dive into a sea of grass in landlocked Vermont.

This charming woodland trail is peppered with poetry.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

This museum on a college campus pays tribute to the Arctic and to two explorer alumni.

The trials and tribulations of marking Poe’s grave.

A museum dedicated to exhibiting remarkable outsider art.

These pretty kitties killed and ate as many as 135 railway workers.