The colorful, smiling concrete silos of Vancouver.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

An extensive collection of ancient Egyptian artifacts and mummies.

The headquarters of a secretive order is also a beautifully-designed park.

This former luxury resort in Kaua'i is now an abandoned relic.

This blowhole is supposedly caused by a trapped monster.

An eccentric home stands out in an otherwise average neighborhood with mosaics, mini topiaries, and kinetic sculpture.

A mesmerizing disco ball-like sculpture along the Sacramento River Walk.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

This giant temperature attraction created some giant electric bills.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

This Federal-style plantation house was once visited by Abraham Lincoln to meet with generals during the Civil War.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

A tunnel with windows, so you don't miss out on the impressive views.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Most-visited and most-photographed slot canyon in the American Southwest.