A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Eat the ultimate iteration of Portugal's most beloved pastry.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This former small town was destroyed not by the motor oil it sprayed the ground with but by the toxic waste that was added.

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

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

A commemoration of over 150 of St. Louis's favorite sons and daughters.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

Less a museum than a bizarre fantasy world created by artists and engineers.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Art Deco stylings conceal the true nature of this bridge.

Seven ceramic sculptures are scattered around this California college campus.

Special tunnels built so that frogs won't be killed when crossing the highway.