Enrich Walldorf and Germany-Netherlands route with verified details

Add admission prices, distances, and Rotterdam as a stop option.
Research-verified: Heidelberg Castle €11, Domtoren €13.50, Speyer Technik Museum,
Caracalla spa, Rhine Valley day trip, Worms.

locations/00-walldorf.md

@@ -8,11 +8,13 @@
 Walldorf itself is a quiet SAP company town, but it sits in one of Germany's most rewarding day-trip zones — the Neckar Valley, Heidelberg, and the northern Black Forest are all within 30 minutes.
 
 ## Must-See Nearby
-- **Heidelberg** (20 min) — Heidelberg Castle ruins above the old town, the Philosophenweg (Philosopher's Walk) along the hillside, the Alte Brücke over the Neckar. Easily half a day.
+- **Heidelberg** (20 min) — Heidelberg Castle ruins above the old town (entry €11 adult, daily 09:00–18:00), the Philosophenweg (Philosopher's Walk) along the hillside, the Alte Brücke over the Neckar. Easily half a day.
 - **Schwetzingen Palace** (15 min) — Baroque palace and enormous garden with a fake mosque. Underrated.
-- **Mannheim** (25 min) — Grid-plan baroque city, strong arts scene, Luisenpark.
-- **Speyer** (30 min) — Romanesque cathedral (UNESCO), oldest surviving synagogue ruins in Germany, the Technik Museum with a Space Shuttle on the roof.
-- **Neckargemünd / Neckar Valley** — Drive or cycle east along the Neckar for half-timbered villages and river views.
+- **Mannheim** (25 min, 30 km) — Home to the second-largest Baroque palace in Europe after Versailles. Luisenpark is a good riverside stretch.
+- **Speyer** (18 min, 19 km) — Kaiserdom Romanesque cathedral (UNESCO, free entry), the Technik Museum has a full-size Buran Soviet space shuttle on the roof plus a Boeing 747 you can walk through.
+- **Worms** (34 min, 58 km) — Cathedral, the Luther Monument (Diet of Worms 1521), Nibelungen Museum, and one of Germany's oldest Jewish heritage sites.
+- **Rhine Valley** (1h 15m, ~125 km) — Drive or take the train along the Middle Rhine: Loreley cliff, Bacharach, Rüdesheim, 40+ castles. A full day or overnight if you want to slow down.
+- **Black Forest / Baden-Baden** (1h, 80 km) — Baden-Baden has the famous Caracalla thermal spa (€21 for 2h); further in: Triberg waterfalls (163m, Germany's highest), Titisee lake.
 
 ## Itinerary (Day Before Departure)
 ### Evening / Last Night

locations/01-route-germany-netherlands.md

@@ -18,11 +18,18 @@ The cathedral alone is worth a stop. Pull off, park near the Domplatte, and spen
 - **Hohenzollernbrücke** — Love-lock bridge right next to the Dom, good photo with the cathedral spire.
 - **Altstadt** — 15-minute walk, old town with brewhouses serving Kölsch in small cylindrical glasses.
 
+### Rotterdam — 30 min past Utrecht (optional detour)
+If you want a city with a completely different feel from the historic ones:
+- **Erasmus Bridge** — Striking cable-stayed bridge; the skyline here feels genuinely modern
+- **Markthal** — Enormous arch-shaped market hall with apartments built into the walls; food stalls below
+- **Cube Houses (Kubuswoningen)** — Tilted yellow cube homes by Piet Blom; one is open to visit
+- **Kinderdijk** — 19 windmills in a UNESCO-listed polder landscape, 20 min from Rotterdam
+
 ### Utrecht — 1.5h from Cologne
-A smaller, quieter Amsterdam with canals at street level rather than road level. Very walkable.
-- **Domtoren** — 112m church tower, tallest in the Netherlands. Views across the flat lowlands.
-- **Oudegracht** — The canal with wharf-level cellars now turned into cafés and restaurants.
-- **Cycle infrastructure** — World-class cycling city; if you need to test any gear, this is the place.
+A smaller, quieter Amsterdam but with canals at street-level rather than road-level — far more walkable.
+- **Domtoren** — 112m church tower, tallest in the Netherlands. Guided tours €13.50 (book at domtoren.nl). Views across the flat lowlands are worth it.
+- **Oudegracht** — The unique two-level canal: boats on the water, café terraces in the medieval wharf cellars below street level.
+- **Cycle infrastructure** — World-class cycling city; good place to test any gear or pick up supplies before England.
 
 ### Delft — 30 min before Hoek van Holland
 Optional quick stop if you're not pressed for time.