Fossils, railroads, and waterfalls!

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

These abandoned waterworks are crumbling into the Potomac River.

Every drop of D.C. tap water flows through this old waterworks.

The oldest natural history museum in western Canada houses more than 5,000 vintage botanical and zoological specimens.

Few other hotels can rival the grandeur of the Castle in the Rockies.

Since its original beginnings as a weather observatory mountaintop, this facility played an instrumental role in gathering atmospheric data for almost 100 years.

The New Central Library is a masterpiece of contemporary architecture in the midst of downtown Calgary.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.

A rescue facility that caters specifically to wolf-dog hybrids, and educates about these unique animals.

The granite head appears to be deep in thought and half buried in the ground.

This mysterious taxidermy man-beast of the seven seas resides at the Banff Trading Post.

A semi-scholarly approach to sex.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

Dakar is home to one of the oldest African art institutions in West Africa.

This unique religious structure is an architectural gem with arresting ocean views.

This giant statue is the product of a mixture of corruption, Stalinist architecture, and North Korean manpower.

Despite a fraught and controversial history this African island holds a powerful monument to the tragedy of the slave trade.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.

A 19th-century architectural masterpiece with ties to Gustave Eiffel.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

This statue honors a pillar of the early New Haven Black community.