Slovakia is a compact country with a surprisingly varied landscape: the snow-capped peaks of the High Tatras, one of Central Europe's largest castle ruins, underground dripstone caves and a fairy-tale castle that inspired more than one Disney set. The D1 is the country's backbone, but plenty of highlights are well worth reaching even when they're not right on the motorway.
The D1 links Bratislava via Trnava, Žilina and Poprad to Prešov and Košice, the natural backbone of a road trip through Slovakia. The highlights below lie partly right along that route, and partly a short, easily manageable detour away.

The High Tatras are the highest mountain range in the Carpathians. From Tatranská Lomnica, a cable car runs to the summit of the 2,634-metre Lomnický štít, home to an astronomical observatory at the highest permanently staffed point in Slovakia.

The best-known and most-visited mountain lake in the High Tatras, at 1,350 metres altitude, surrounded by pine forests and peaks, one of the finest spots for hiking.

One of the largest castle complexes in Central Europe, now partly in ruins, with roots dating back to the early 13th century and covering more than 4 hectares. UNESCO World Heritage Site.

Slovakia's most-visited cave, with more than 8 kilometres of passages and striking dripstone formations, located in the Low Tatras.

The white castle towers high above the Danube, with a compact, atmospheric historic old town right beneath it. It makes for an easy short stopover.

Slovakia's most-visited castle: a romantic, turret-covered fairy-tale castle from the 19th century, built on the foundations of a medieval stronghold, with its own zoo in the grounds.
This selection is a starting point. Combine it with the prices and validity periods of the Slovak vignette to complete your route.