A perfectly circular lake is formed by the crater of an ancient underwater volcano.

As the highest point in the Mid-Atlantic range this stratovolcano offers spectacular views.

This impressive coastal fortress was destroyed before it was finished.

Copenhagen's celebrated theme park and gardens.

Four whimsical figures make for an unexpected sight along an urban commuter route.

Fossils, railroads, and waterfalls!

Though many were skeptical at first, these animal-specific routes across the Trans-Canada Highway have been a major conservation success.

One of Scandinavia's largest mosaics pays tribute to Danish art and science luminaries.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Da Vinci's equestrian statue, 500 years in the making.

This artificial archipelago was supposed to resemble a map of the world.

The building is a gigantic piece of art inspired by the shape of a desert rose.

This vibrant side road in Doha was painted light blue to reduce heat.

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Bridge that died in war and was resurected.

The local club's soccer field is practically surrounded by UNESCO-protected monuments.

The interior of this church has been turned into a memorial to locals who died in Croatia's Homeland War.