Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Baroque celebration of the end of the Great Plague of Vienna.

Once the home of a hermetic monk, this cave now houses a small church.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This plaque marks the former home of one of the first women physicians in the Netherlands.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A set of seven houses, each built in a style that represents a European country.

Cozy basement bar sports an inventory of over 2,000 beers.

Climb inside an iron crystal magnified 165 billion times its normal size.

In an area known in Bratislava’s postal history, this sculpture sits equipped with a functional postbox.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

This iconic science fiction house still looks like something from the future.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

This sidewalk tribute honors Colorado's great culinary creation.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A multiversal transit station located right below a highway interchange.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.