World's largest bell sits on the grounds of the Kremlin in Moscow.

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

This unusual lava tube spouts seawater during high surf.

The grand marquee of this abandoned Hawaiian theater remembers the building's elegant past.

A winding district gerrymandered into the shape of a mantis.

The spot where the namesake of the Douglas fir met his mysterious end on a Hawaiian volcano.

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

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

A Hawaiian stairway to heaven—that you can't climb.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

This ancient Hawaiian henge may have been an early star chart.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

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

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Just below the surface, shrimp are producing temperatures hotter than the sun.

Rare recess caves fill this unbelievably beautiful Ohio park.

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

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

Could it have picked a better place to land?

This unassuming home was once “grand central station” for the Underground Railroad.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.