Iceland's largest lagoon is home to stunning multi-colored icebergs.

A sulfuric martian landscape that looks far better than it smells.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

This bridge was constructed from the rubble of the infamous Bastille.

France's most famous cemetery, with some of its most curious tombs.

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

Copenhagen's celebrated theme park and gardens.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

The largest hewn stone in history.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Experiencing Guatemala's sensory-exploding church is a blunt reminder of European influence.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

The hallucinogenic center of the ancient world.

A community farm in the midst of the Brooklyn concrete.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The "Prussian Versailles" that is as glorious today as when it was built.

One of Hollywood’s favorite government buildings.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Ozymandias’ time-keeping temple.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

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

A newspaper building that made radio history.

A controversial memorial at the place where Captain Cook met his violent end.