``My last supplication of all, is this; and with it, I will relieve you of a visitor with whom I well know you have nothing in unison, and between whom and you there is an impassable space.

``Grenoble and Lyons are faithful cities, and will oppose to him an impassable barrier.''

Those who would, as it were, force a passage to his heart, found an impassable barrier.

A high-road, though entirely neglected, does not become altogether impassable, though a canal does.

But what we call the cross roads, that is, the far greater part of the roads in the country, are entirely neglected, and are in many places absolutely impassable for any heavy carriage.

On each continent, also, we see the same fact; for on the opposite sides of lofty and continuous mountain-ranges, and of great deserts and even of large rivers, we find different productions; though as mountain chains, deserts, etc., are not as impassable, or likely to have endured so long, as the oceans separating continents, the differences are very inferior in degree to those characteristic of distinct continents.

So that three marine faunas range northward and southward in parallel lines not far from each other, under corresponding climate; but from being separated from each other by impassable barriers, either of land or open sea, they are almost wholly distinct.

On the other hand, proceeding still further westward from the eastern islands of the tropical parts of the Pacific, we encounter no impassable barriers, and we have innumerable islands as halting-places, or continuous coasts, until, after travelling over a hemisphere, we come to the shores of Africa; and over this vast space we meet with no well-defined and distinct marine faunas.

A region now impassable to certain organisms from the nature of its climate, might have been a high road for migration, when the climate was different.

We can further understand the singular fact remarked on by several observers that the productions of Europe and America during the later tertiary stages were more closely related to each other than they are at the present time; for during these warmer periods the northern parts of the Old and New Worlds will have been almost continuously united by land, serving as a bridge, since rendered impassable by cold, for the intermigration of their inhabitants.

"Yet if the lady is correct in saying that the flooring and walls are sound, and that the door, window, and chimney are impassable, then her sister must have been undoubtedly alone when she met her mysterious end."

The kingdom is a peninsula, terminated to the north-east by a ridge of mountains thirty miles high, which are altogether impassable, by reason of the volcanoes upon the tops: neither do the most learned know what sort of mortals inhabit beyond those mountains, or whether they be inhabited at all.

C. Michael Hogan hypothesizes that the route of march between these two camps would likely have been in the shadow of Craggie Cat, in order to avoid the boggy high ground to the west and the formidable impassable Red Moss bog to the northeast. Noted historical features in the vicinity include Netherley House and Muchalls Castle.

Route 70 and the railroad line provide an alternate route between Sacramento, California and Reno, Nevada when Interstate 80 and the Overland Route, which cross the Sierra Nevada via Donner Pass, are impassable due to winter storms.

Polly Shortts is named after a farmer who lived nearby, and whose help was often sought when after heavy rain, the road up the hill became muddy and impassable.

Near Kapoeta the river is about 150 yards wide, and normally has a sandy dry bed, but heavy rainstorms in the Didinga Hills can turn it into a raging, impassable flood overnight.

West of the Matmata Hills, the terrain is dry country, the Dahar, and then impassable sand of the Grand Erg Oriental. The Oasis town of Gabès lies on the coast where the coastal plain meets the route from the Tebaga Gap.

By the end of the Third Age, the Old Forest Road had become overgrown and portions of the road east of Mirkwood had become impassable.

As early as the "Lays of Beleriand" until the "Children of Húrin" it is described as uncrossable on foot except at a very few places: far north at Eithel Sirion, at the ford of the Brithiach, over the Guarded Bridge near the tributary Esgalduin and below the tributary River Aros, south of the impassable Marshes of Sirion was the land bridge of the Andram above the Gates of Sirion.

The walls of Xiangyang were some six to seven meters thick encompassing an area of five kilometers wide,the main entrances leading out to a waterway impossible to ford in the summer, in the winter an impassable swamp and series of ponds and mud flats.

Most of the feeder roads are impassable during these seasons and a lot of crops go to waste.

There is no maintenance and there are no more road signs past mile 1.5 and is marked "impassable" by several geological maps.

Some of the NPCs were to have unique capabilities; for instance, one character would have the magic ability to flatten mountains, and was to be a critical recruitment for one of the mini-quests, allowing the player access beyond an impassable mountain range to retrieve an item.

""Çanakkale geçilmez"" (Çanakkale is impassable) became a common phrase to express the nation's pride at stopping the massive assault. The song "Çanakkale içinde" ("A Ballad for Chanakkale") commemorates the Turkish youth who fell during the battle.

Grashio and several others were later assigned to a smaller work camp set so far into the jungle the Japanese did not think prison walls were necessary to keep the weakened and sickly POWs from trying to escape through an "impassable" jungle, but by will power and planning they did indeed escape and became the only group of Japanese prisoners to ever do so by their own means during the entire war.