There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

This ancient oak plays host to carvings of magical elves, gnomes, witches, and other creatures prominent in local folklore.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

A roadside shrine to a late rock god only remains thanks to the unyielding efforts of his fans.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

These morbid carvings remind churchgoers of the inevitability of death.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The childhood home of Earth's alien chameleon is a humble Brixton flat.

Pop culture has helped to keep this iconic British building from being destroyed.

This London plaque marks the spot where David Bowie's famous alien made his debut.

An artistic tribute to the famous singer, just around the corner from where he was born.

This 1920s Dutch barge is now a floating bookstore.

Rebuilt remains of a temple to Roman god Mithras.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Remnants of a Victorian garden feature sitting in public woodland.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Art and a pun, all in one.