Only known mainland rookery of the threatened Stellar sea lion.

The largest wooden building in the world now houses a fascinating collection of aircraft.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

A sleepy little town that had the greatest landslide in North American history fall on it.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This landmark cemetery in Boston was created more than 300 years ago.

A centuries-old church stands as a testament to Boston's "father of architecture."

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

The site of Paul Revere's historic two lantern warning.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The "lovely red Vega" of the legendary record-settling pilot.

The "Crow Boat" of Kootenay Lake, sold for a dollar and now on display as "the world's oldest intact passenger sternwheeler."

A walk through the historic city center, under the streets of Seattle.

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

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

One of the final concrete ships built before World War II is now a crumbling breakwater.

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

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

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Famously misunderstood wonder of the ancient world

A six-ton wedding present for the King of the Scots.