The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

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

The deserted railroad town had a last gasp as a ghost town attraction before being abandoned for good.

This park straddling the United States-Canadian border has been a symbol of peace since 1932.

This colossal reptile celebrates the history of the now-defunct Canadian Turtle Derby.

Eat the ultimate iteration of Portugal's most beloved pastry.

The world's oldest bookshop still in operation.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Once a meeting point for great thinkers, and the midpoint of the country.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Copenhagen's celebrated theme park and gardens.

Hans Christian Andersen for the postmodern world.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

An artist's whimsical transformation of everyday objects.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

This chimerical bridge/tunnel appears to dead end right into the sea.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.