A miniature train theme park, free to the public, laying at the base of the Santa Monica Mountains.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

The fragmented remains of a massive public bath connected to the city's water supply.

The water of this well in Toledo lost its sweetness after the death of a young love.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

At least according to the Guinness World Records.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

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

This lucky bronze frog was gifted to Madrid by a casino.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

A lush indoor jungle fills this bustling Madrid transportation hub.

The 43-mile route crosses through six islands with gorgeous views of the Seto Inland Sea.

A celebrity from the late Cretaceous period.

A very classy 1920s-era bar right in Grand Central Station.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

A bit of retro transportation flair preserved in the world's largest department store.

Home to the world's oldest wooden building.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

A shrine contains nearly 200 statues of the Buddhist deity Jizo, dressed in bibs by parents who have lost a child.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.