This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

The hallucinogenic center of the ancient world.

Rare recess caves fill this unbelievably beautiful Ohio park.

A rich collection honors the iconic American artist, down to the jacket worn in his “Freedom of Speech” painting.

A stone monument marks the location of the final battle of an armed uprising which had a significant impact on the creation of the US Constitution.

Dedicated in 1895, this is the world's first tribute to the hardworking newspaper delivery boy.

This historic site was where the renowned civil rights activist spent the first five years of his life

The corner walls of a primary school showcase a Mexican version of memento mori.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

A neo-Gothic temple in central Mexico featuring a labyrinthine network of crypts.

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

Mexico's astounding mummy museum with "the world's smallest mummy."

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

A small site dedicated to the memory of a local leader and the search for peace.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

The world's smallest drawbridge.

An unassuming 13-acre park is home to over 12,000 roses.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

Wander the sprawling living museum on the site of one of a 16th-century community.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

The mansion home of author Edith Wharton.

You can get anything you want at the former site of the restaurant immortalized by Arlo Guthrie.

Eight whimsical acres of metal art.