The narrowest house in America is seven feet of pure spite.

What looks like missing grout is actually an old pub's peephole.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

A rare octagonal brick beacon on an isolated island in the Baltic.

An ingenious solution to a tricky engineering problem, this spiraling bridge takes drivers for a dizzying spin.

The unusual stilted beacon is the town's only active lighthouse.

These rustic holiday homes are made from discarded fishing boat hulls.

Only six people can sit inside this delightfully quaint sanctuary.

An architectural oddity hides in plain sight on this iconic London bridge.

The most remote tree in the world is more than 170 miles from its nearest neighbor.

Norway has built what may be the world's most beautiful public toilet.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

The most remote tree in the world survived desertification, but not a drunk truck driver.

London's smallest police station is barely the size of a phone booth.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

This woodland architectural installation acts as a camera obscura for the heavens.

This abandoned lighthouse looks like a rusting oil rig, but has managed to survive a number of storms.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.