An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This stunning Connecticut mansion is actually just a one-room-deep hoax.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

The final resting place of a wealthy landowner who helped create the largest public park in Western Massachusetts.

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

New Orleans' famous cemetery, located on the site of a former race track.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

This replica of the Greek structure is in the heart of Nashville.

A statue honoring 44 continuous years of greeting passing ships.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

Tucked away inside a historic Savannah hotel is a hundred-year history presented in ladies' lids.

This kitschy tavern is also home to rare early editions of "Treasure Island."

This quirky curiosity shop takes its cues from the world's bazaars.

"X" marks the spot of an echo chamber in the middle of a plaza.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Eighty million natural history specimens call this gargantuan museum home.

Catacombs turned marketplace.

Famously misunderstood wonder of the ancient world