A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

The early 20th-century home features cutting-edge technology of the day, such as ammonia refrigeration and needle showers.

This is the oldest Roman-made bridge in the city still existing in its original state.

No one really knows how these old hobby horses got here, but the herd keeps growing.

The Burnside Fountain and its questionable interpretation.

This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

"Try not to knock anything over!"

Built in 1821 using rooms from another estate, the Phillips House is the only historic home on scenic Chestnut Street open to the public.

Visit a sweet shop selling one of the first candies ever made and sold in America.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

This semi-secret storybook hedge maze is also the oldest garden in the city.

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

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

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

The 25th President's marble casket can be visited in this classical Ohio tomb.