This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

Underground tunnels remain beneath this abandoned mental asylum.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

The Connecticut village named for its subterranean thunder.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

The only town in the world with two exclamation points in its name.

The profile of one ill-fated deacon was emblazoned forever on this church window during the Halifax explosion.

The city of Halifax still bears the scars of the largest explosion prior to the atomic bomb.

The final resting place of 121 victims of the RMS Titanic, 42 of which may never be identified.

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

The highest tides in the world come in and out here twice a day, allowing you to essentially walk along the ocean floor.

A mysterious spot where the laws of gravity seem not to apply.

Iconic rock formations that allow for exploration during high or low tide.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

The largest tidal whirlpool in the Western Hemisphere.

A roadside park in eastern Maine first marked the halfway point between the equator and North Pole with a brass pin in 1896.

A real plaque marks the spot where a Faulknerian character committed fictional suicide.

A small Portuguese cottage formed between boulders in the countryside.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.