These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

This unusual lava tube spouts seawater during high surf.

The famous aviator's final resting place is a study in natural beauty.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

A tunnel of hardened lava along Maui’s famous Road to Hana.

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

This tiny Hawaiian island is slowly coming back to life after being bombed during naval training exercises.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

This naval gun is fired every day at noon, an odd timekeeping tradition the origin of which is local legend.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

This hulking behemoth is actually five interconnected towers built in the 1960s.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A surreal statue honoring Prague's favorite literary son.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

The only museum with its curator—and her pets—buried inside.

Where Venice's gondolas go for a tune-up.