Take a dip in the world's largest mineral hot springs pool.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

Considered by many to be one of the most dangerous highways in Alaska.

The ruins of a town wiped out by the second-largest earthquake in recorded history.

The first "applecore" style lighthouse in Nova Scotia.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

Destroyed numerous times, this centuries-old bridge has always been rebuilt with its original design.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

This saucy statue once caused outrage among locals.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

A quirky monument to the 49th parallel in downtown Prešov, Slovakia.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

These plaques found across Warsaw commemorate the sites where executions or battles took place during the German occupation.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

Atop this library is one of the most beautiful green spaces in Warsaw.

The last king of Poland was interred in this church nearly 200 years after his death.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.