This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The United States Capitol's former columns still stand.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

A 16th-century horror show built in a lovely Italian garden.

Hot springs monkey spa in the middle of Hell's Valley.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

Enormous lake at the bottom of a unique cave system.

Started as a kitchen garden, now the second largest botanical garden in the world.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

A layered tribute to the work of mosaicist Isaiah Zagar.

Notorious artist squat renovated into legal studios.

A bizarre house filled with an astounding array of collections.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

On Japan's Tashirojima Island, cats are king.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An emerald-green grotto just a short trip from Austin.